Dr J M Lange
email: jean-marc.lange@univ-rouen.fr

Education in sustainable development: how can science education contribute to the vulnerability perception?

Keywords:

Education for human development within the constraints of sustainability is problematic for schools. On one hand, it is a political idea that continues to evolve with successive compromises between social groups with differing or even conflicting interests. ESD is therefore inherently 'non-disciplinary' and cannot be the basis of a single school subject if we wish to keep the creativity that results from the dynamics at work. On the other hand, SD leads us to think collectively about solutions that ensure a future of our choosing that preserves the biological capacity of the planet and to reduce our vulnerability. The sciences thus have a key role: their ability to question the world and to model the consequences of collective and individual choices. But there is a risk of technocratic drift and SD leads us to think about society's values and aims. A new link is established between sciences and humanities with a democratic model in sight. This paper presents what is possible out of the prospective scenarios method within general and compulsory education by seeking, through an empirical approach, to determine its feasibility, its contributions, its limits, and to locate the place of science education in the elaboration of the perception of "vulnerability". Both primary and secondary schools are concerned.

Introduction

Sustainable Development (SD) can be understood as a deep and irreversible process of expansion of the scope of the policy to the whole planet, including in its physical and biological dimensions. This change, driven by international institutions such as the UN as well as NGOs, creates a renewed need for knowledge. The resulting demand brings about a profound rethinking in national academic research. One consequence is that major research institutions have become part of an SD strategy to which each must respond, while bringing about significant changes in both goals and research methods (O. [START_REF] Godard | Le développement durable et la recherche scientifique ou la difficile conciliation des logiques de l'action et de la connaissance[END_REF]. The idea of SD is gradually gaining credibility in the scientific world while continuing to be debated in society more broadly. It plays a role in mobilising social actors in general and researchers in particular, and calls for their responsibility. This enlargement of the policy's scope can mainly be seen through a new concern given to future consequences of human actions. Born in Germany about thirty years ago, a principle of anticipation, and then foresight (Vorsorgeprinzip) vis-à-vis the management of natural resources, was developed by the German government at the time. This principle seeks to go beyond mere protection against immediate dangers, and is envisaged most often according to an insurance approach, for a consideration of the long-term risks, whether or not identified, and the environmental and social implications of the decisions taken [START_REF] Doron | Le principe de précaution : de l'environnement à la santé[END_REF]. It was incorporated by international and national authorities into the term 'precautionary principle'. This principle became constitutional in France in 2004.

The current development of human societies is therefore called into question under the new constraint of sustainability. Consideration of the short, medium or long term future is needed to meet this requirement of sustainability. The importance of this has been the subject of much debate. However, it is more through the concept of vulnerability that sustainability gives rise to thinking and research, 'vulnerability' of social groups and/or bio-physical systems. For [START_REF] Bidou | Décrire la construction temporelle des vulnérabilités[END_REF] vulnerability can be understood to be: 'The characteristics and situation of a person or group that influence their abilities to anticipate, cope, resist and recover after the impact of a hazard.'

A component of risk, the concept of vulnerability includes the concept of 'anticipation' of the implications of decisions made and suggests actions to reduce it. It is in this way inherently 'hybrid' [START_REF] Jollivet | Eléments de théorie pour une recherche interdisciplinaire sur les interfaces natures/sociétés[END_REF]. Consistent with this view of vulnerability, the current research on development employs an interdisciplinary methodology to analyse situations in terms of root causes, dynamic pressures and dangerous conditions, characterising vulnerability in view of a hazard [START_REF] Wisner | At risk, Natural hazards, people's vulnerability and diseaster[END_REF]. In education situations, especially in the case of general and compulsory education, we will retain, initially, the need for a perception and ownership of the vulnerabilities of our societies by the pupils themselves. This means their ability to identify risks and issues at stake, to anticipate the implications of their actions, and to identify current mechanisms for efforts to reduce vulnerabilities.

Key questions

We have proposed [START_REF] Lange | Education au développement durable et éducation scientifique : Repères pour un curriculum[END_REF] a familiarisation of prospective scenario approaches in school. The prospective scenarios aim to establish the advantages and disadvantages of solutions and strategies used and allow the streamlining, on the lowest possible level, of a procedure of choice between options [START_REF] Mermet | Prospectives pour l'environnement : quelles recherches ? Quelles ressources ? Quelles méthodes[END_REF]. They thus help to reduce uncertainties and to think about the future. In this perspective, support from the sciences proves necessary. This idea of science and technology education working towards the understanding the problems of society is part of what [START_REF] Roberts | Scientific literacy/science literacy[END_REF] calls 'Vision II'. But in what form can the contribution be envisaged? Does the sole 'intelligibility' of SD issues through the use of the sciences turn out to be enough? Do we not risk again coming across a technocratic drift long emphasised by authors such as [START_REF] Fourez | Constructivisme et justification éthique[END_REF]? For him, inspired by Boltanski and Thévenot, technocracy purports to show constraints which will be treated 'as a determination acting on individuals without demanding an intervention of their will'.

Our aim is to develop what is possible of the prospective scenarios method within general and compulsory education by seeking, through an empirical approach, to determine its feasibility, its contributions, its limits, and to locate the place of science education in this system.

Methodology

Empirical support To answer these questions, three projects were monitored, in upper primary school, lower secondary school and upper secondary school. The teachers involved, integrated into the research group operating according to the methods of collaborative research [START_REF] Bednarz | Approche collaborative de recherche. Une illustration en didactique des mathématiques[END_REF], had in their roadmap the recommendation to include in their project an element of anticipation, if possible in the form of prospective scenarios. This is not a matter of building an ideal type or developing a comprehensive picture of what exists, but exploring the possible ways of bringing a new educational reality into existence. The methodology used is that of the case study.

Project 1: primary school The project carried out at upper primary level is aimed at science, technology and citizenship education. The aim was to construct a model giving an account of what an ESD project could be, shaped by the various opinions expressed on the issue. The pupils elected children to play the role of delegates and outlined the proposal, made by elected local officials, to study two projects of the school: the relevance of a rain water recuperation system (first year), and relevance of a solar water heater at the school (second year). Pupils set out the problems to solve to meet this requirement. Having checked the feasibility of the project, modelling was done.

The key elements of the project (first year) are recounted below: -initial ownership of issues for the project in the form of in situ measurement of the biotic index of a river, in order to build the idea of pollution; -use of some biological models (ecosystem, food webs, water cycle…); -the achievement of mock-ups and technological models in order to verify the feasibility of the proposals of the rainwater harvesting; -the solicitation of different partners (local water agency, director of a station of purification, architect, elected) ; -structuring in the form of panels supported by an argued case and a presentation to the city council through the council of children Then, the economic and environmental dimensions involved were explored, and a rationale was constructed over the course of the year in order to assess the advantages and disadvantages. Specific work was then carried out on the rationale. A final debate made it possible for them to put selected arguments to the test in the presence of experts and then in front of local "decision makers". The work to develop scenarios, however, was integrated only at the end of the project.

Project 2: middle school Carried out in lower secondary school as a cross-subject project (Life and Earth Science (LES) and technology), the project aimed ultimately to form the basis for obtaining the label '3D establishment' (establishment in a way of sustainable development). This cross-subject project enabled computerised slide shows to be developed, focusing on the development of prospective scenarios, on the issue of waste and how to manage and reduce it. It took the form of the construction of prototype containers and included a feasibility study, establishment of functional specifications, selection and validation of the prototype, then the creation of manufacturing lines. In addition, many discussions have allowed exchange on these issues. On balance, the debate argued for implementation of a unifying project: "Think Global, Act Local". This involved considering a range of opinions in relation to scientific rationality from modelling to develop its own knowledge. It is then proposed the achievement of panels of information, awareness-raising for the entire college (acting locally). In the end, (first year) the students have created original models of wheelie bins for the collection of recyclable paper and containers for batteries and printer cartridges. Each year, a new project was completed.

Project 3: High School Carried out in the third from last year of secondary school, this project was integrated into the Life and Earth science (LES) class, together with history, geography and mathematics classes, and concerned Climate Change. Entry into the sequence is from the societal dimension. A discussion of about 30 minutes with students identified the need to formulate an argument constructed to legitimize the proposals. This argument, in the event scientific, is to proceed by responding to the cognitive impasses encountered by the students. A literature search on the Internet allows searching for evidence while at the same time querying on the latter: their scientific character, their objectivity and relevance. This research is also the opportunity to be confronted with forms of various communications used by scientists: photography, graph, table… The project conducted is multidisciplinary: -a History-geography / LES collaboration. This collaboration is the first to have been conducted. Climate change and its consequences allow weather considerations to address the concept of risk, combination of a hazard and vulnerability, and history/geography background. The risk of cyclones may as well be addressed in the extension of this study of climate change, with in particular, the consequences on the more populated areas.

-a Physical-chemistry / LES collaboration. This case involves the teaching of physics/chemistry to treat luminous radiation, and associated emission and the absorption matters. The understanding of the processes at work in the greenhouse effect under control, the latter, in LES, can then be processed more quickly.

-a Mathematics / LES collaboration. This collaboration resulted in the development of knowledge relating to the descriptive statistics for the program. The data relating to climate change: rates of carbon dioxide, annual mean temperatures, and annual number of cyclones actually allow a mathematical treatment. A treatment that leads to the obtaining of graphic representations viewing in a more or less expressive the changes to the implementation and can enable a critical analysis of the choice of scientific representations. Meetings were held with experts and a final presentation to the families was made at an open day. The approach focuses on scientific modelling and simulations and includes elements of debate.

Empirical methods

Two methods are used: On one hand, the method is one of highlighting the global dynamics at work among pupils. Indeed, the idea of SD and that of ESD -not as a solution but as a collective process of seeking solutions -leads us to give an account of the dynamics at work among pupils rather than a level to be achieved. To do this, the interviews of participating pupils are analysed using a grid developed by theoretical and empirical trial and error during a pre-exploratory phase. This grid, which can be found in the appendix [START_REF] Lange | Elaboration et mise à l'épreuve d'un cadre théorique pertinent permettant l'analyse et le questionnement de l'Education au Développement Durable : vers l'identification d'indicateurs[END_REF] includes the level of complexity of speech, the ownership of the issues at stake in SD and ESD and the propensity to act, which allows for the establishment of support for collective action and identification of the obstacles hindering or counteracting such action. Interviews were conducted at the start and the end of this process.

On the other hand, in this paper there is also a special focus on the assimilation/integration of the issues at stake, the perception of vulnerability and the otherness to an individual or collective action.

[NEEDS A SENTENCE OR TWO ON DISCOURSE/GRAMMATICAL ANALYSIS TO INTRODUCE THIS APPROACH] Ownership of the issues at stake in sustainability is assessed by counting at the start and at the end the instances of je ('I') or on (understood in the collective sense of 'we' and usually followed by an action verb) in relation to the instances of impersonal on -understood in a generic sense and usually followed by a conditional [START_REF] Lange | Rencontre entre deux disciplines scolaires, biologie et mathématiques : première approche des enjeux didactiques de la formation des enseignants de biologie[END_REF]al., 2008, 2010). The perception of vulnerability is identified through the expression in pupils' speech of a feeling of indifference or rejection of sustainability issues, the postponement of the plan to act until later (future generations), or the expression of urgency to act now for a future we can better master [START_REF] Lange | Rencontre entre deux disciplines scolaires, biologie et mathématiques : première approche des enjeux didactiques de la formation des enseignants de biologie[END_REF]al., 2008, 2010). Finally, there is the issue of otherness: the other is expressed as a support for or an obstacle to the action for SD, because of the need to take collective responsibility for issues of sustainability [START_REF] Lange | Rencontre entre deux disciplines scolaires, biologie et mathématiques : première approche des enjeux didactiques de la formation des enseignants de biologie[END_REF]al., 2008, 2010).

Data collection

The projects' highlights were filmed, and the pupils were interviewed on a voluntary basis at all stages of the projects. The technique is that of semi-structured interviews and follows a framework guide adapted to the class level and time of data collection.

The interviews are carried out in groups at primary level, and individually at secondary level. Only partial results on the first semester of 2008 are presented in this paper. They were attained at the start and end of the semester, as part of the ongoing educational projects:

Project

Number of interviews at the start

Number of interviews at the end

Methods

Upper primary level

All the pupils in the class

All the pupils in the class

Interviews in pairs

Results

Educational dynamics

 Project 1 As the interviews were carried out in groups, it was not possible to analyse individual dynamics. However, after the initial project was completed, a collective summary of what were thought to be the issues at stake was made in the form of posters, reproduced below: Current world

Catastrophism

Ideal future ++ Increase in complexity of discourse ; Suitability of SD stakes, REm + Increase in complexity of discourse ; Propensity to act but the knowledge remains school RAlic ++ Destabilised by the new academic format; Increase in complexity of discourse RAlin + Desire to make good practices for others but not in acting it; Knowledge remains academic RNa + Positive evolution and weakness of the rational RD + Remain very "learned knowledge"; weakness of the rational RO -Regressive development; SD rejected (too difficult) RL + Increase in complexity of discourse ; Propensity to act; Others as a social constraint RCa + Propensity to act ; Increase in complexity of discourse; Others as a social constraint RT + Suitability of SD stakes; Propensity to act ; Increase in complexity of discourse; Others as a social + Increase in complexity of discourse; Suitability of SD stakes; Convinced but not yet responsible RY + Increase in complexity of discourse; Suitability of SD stakes; Convinced but not yet responsible RLAE + Become aware; Desire to act but epistemic fatalism connected to the gravity of the situation RN = Argued engagement; Lack of understanding of the scholar stakes of the ESD RMA -Desire to act but content does not answer its desire; He is in action but doesn't waiting for knowledge RH ++ Evolution towards discourse argued in relation to the appropriation of the stakes RJ + Discourse agreed upon towards a discourse superficial; Argumentative profit RS + Too much young person to act; Discover political and economic analysis; He becomes convinced

but not yet responsible RG + In epistemic doubt at the beginning then becomes enough convinced but no yet involved as citizen RLAU ++ ;Suitability of SD stakes ; Increase in complexity of discourse ; Desire to act RMEG + Suitability of SD stakes ; Increase in complexity of discourse; Desire of action RCC = Desire to act; Increase in complexity of discourse; Responsibility with intergeneration RCD + Beginning of suitability of SD stakes; Change in representation of science RCEL -Discourse remains superficial; Appreciate the debate, but indifferent about SD RMEL + Convinced, indeed even responsible, but there is a drop of enthusiasm due to the new academic format; Increase in complexity of discourse RCL + Evolutions towards issue about SD, but not yet responsible. destabilised by the new academic format (the academic format drive by the process and not by the product)

Focusing

Focusing on the assimilation/integration of the issues at stake; the perception of vulnerability and the otherness to an individual or collective action are made in this section.

 Assimilation of the issues at stake

The evaluation of an assimilation/integration of issue at stake is conducted through a quantitative approach. The graph below shows the evolution of the instances of je ('I') and on (understood to mean 'we') compared with the instances of on (understood in its generic sense).

 Perception of vulnerability

The issue of time is an integral part of the issue of SD. However the planned action may be postponed to the distant future or, on the contrary, there may be an awareness of the need to act today for a future we can control.

linguistic indicators Extract of interviews Later

"well we won't be able to breathe any more and if there are children just after it'll be difficult for them to live in that world' 'It's so that when we have children, they won't be ill'

Actual and urgent

Analysis of the results and discussion

Obtained results are analysed from two points of view: that of their efficiency on pupils (about the three focuses) and that of the dynamics at work in the pupils.

Project relevance and limitations

The first project (primary school) aims to renew the dynamic of the science and technology class: the issue of the meaning of these teachings is settled by seeking an ability to understand social issues through an effective and active implementation, supplemented by an experience of participatory citizenship. This project could be a demonstration of Roberts' 'Vision II'. However, we can note that the ownership of the issues at stake in SD and the perception of vulnerability are made in simplistically dualist thinking: utopia or future catastrophe.

The second project (middle school), meanwhile, focuses directly on the development of prospective scenarios aiming to formulate problems about the issue of waste management, and then the technical implementation. No pupils refer to scenarios spontaneously in interview, except in the slideshow format in which the scenarios were developed and communicated to others: only the academic aspect of learning technology counts. However, the ownership of the issues at stake isn't evolving positively and a certain dynamic of perception is taking shape.

Finally, the ability to interact with the other isn't reinforced.

The third project (high school) combines societal debates and an anchoring in the sciences. In particular, the use of scientific modelling and especially in their predictive function is systematic. The perception of vulnerability increases even more but a dynamic of ownership of the issues at stake does not appear. However, the project refers only to a purely individual responsibility: no effective and collective action is established outside the simple final presentation. This is reflected in the relationship with the other, which remains unchanged.

Dynamics of change, effectiveness of activity

For the pupils, the analysis is conducted from the perspective of the difficulties met and the dynamics of change at work in them, not in terms of a state to be achieved. These dynamics are positive if the pupil progresses towards an ownership of the issues at stake, a more complex way of thinking, a renewed connection between science and society, a propensity to act today, and support for this education within the school.

They may be neutral if, for these characteristics, the pupil keeps his or her initial stance, particularly a 'utilitarian' stance, i.e. a relationship to the school only as a means of gaining a qualification.

Finally, we will describe them as negative if the pupil is progressively abandoning any intention and willingness to participate and act. We analyse this 'regressive' development in terms of epistemic inhibitions (a catastrophist relationship to the world) and social inhibitions (the other seen as an obstacle) respectively. There are two pupils in this situation in the High School. One of them shows indifference towards the issue of SD (CEL in Table 2) and the other has an attitude of rejection: eager to act, the pupil does not support the work carried out, mainly for reasons of lack of evidence (MA in table 2):

MATI: 'I don't think we've seen enough concrete acts, we saw the reason but not enough concrete acts'.

General Discussion

It seems that a number of generalisations can be drawn from our results from these three case studies, because they were found to be relatively stable over the duration of the research. These regularities relate to the following points:

Catastrophist effect and thinking

It is possible to envisage two levels of interpretation of catastrophism. A first level corresponds to an emotional connection and struggle with the world that originates from intrinsic mechanisms inherent in the psychological development of the learners and extrinsic and collective mechanisms relayed by the media. Research in science education has long identified the first mechanism by using science history and highlighted its function as an 'epistemological obstacle' which would then be overcome. But there is another level of catastrophism that [START_REF] Dupuy | Pour un catastrophisme éclairé, quand l'impossible est certain[END_REF] calls 'enlightened catastrophism'. This underlines the fact that belief in the possibility that catastrophes occur is a necessary and indispensable condition to acquire the conviction that there is a need to act and change the status quo. He argues that this state of conviction can be achieved through backing by scientific knowledge. He claims the creative capacity of humans generates the necessary changes for a progression to an ethic of responsibility, thus returning to the conviction/responsibility distinction developed by [START_REF] Weber | Le savant et le politique[END_REF].

In the pupils' speech we often find, especially among the youngest, this first level of catastrophism which effectively translates into a feeling of helplessness and suppression of the intention to act. This is expressed in an epistemic register: 'it's too serious, there's nothing to be done any more' but also in a register of otherness that reinforces it: 'I alone can't do anything; everyone should be getting involved'. This can be found in the pupils' speech initially or instead develop as the educational action is taking place. We are therefore keen to put forward the theory that the enactment of effective and collectively agreed solutions is necessary for the pupils to avoid or overcome this state of inhibition. This is an issue of paramount importance for ESD.

Pupils could take ownership of the prospective scenarios approach in two distinct and contrasted forms:

-a discursive form, possibly but temporarily catastrophist, corresponding to an initial ownership of the issues at stake and the process to formulate problems and to conceptualize narratives, that different studies have established about science education [START_REF] Orange Ravachol | Des mises en histoire aux savoirs scientifiques : le cas de lycéens confrontés à quelques problèmes de tectonique des plaques[END_REF]. This common narrative that's appearing also promotes a new worldwide "live-together" perspective [START_REF] Descola | L'écologie des autres, l'anthropologie et la question de la nature[END_REF].

-an elaborate form that involves scientific concepts and modelling, we are calling "reasoned opinion" [START_REF] Lange | Didactique curriculaire et « éducation à …. la santé, l'environnement et au développement durable » : quelles questions[END_REF].

Ownership of spatiotemporal and complexity scales

For the youngest pupils, it is clear that scalar and complexity thinking is, as confirmed by several interviews: 'If I don't do it [collecting rainwater], the planet will die'. This type of reasoning is also found in the higher levels. The aphorism 'act locally, think globally' often put forward as part of SD finds its limit here: the correct perception of the issues at stake and the possibility of the action are conditional on the ability to make connections in terms of quantified and prioritised importance. The gap in the question may be filled by multidisciplinary and literature-based investigations around issues at stake to work systematically on the spatiotemporal and complexity dimensions by mobilising the methods and concepts of various disciplines. 'Islands of rationality' like a result of a modality of interdisciplinary inquiry (Fourez;[START_REF] Fourez | Qu'entendre par « Îlot de rationalité » ? Et par « Îlot interdisciplinaire de rationalité[END_REF][START_REF] Bader | La démarche de structuration des îlots de rationalité : une approche des QSV soucieuse d'épistémologie des sciences et d'équité en éducation aux sciences, Efficacité de l'approche des Questions Socialement Vives pour l'éducation à l'environnement et à la durabilité[END_REF] on the issues would be developed.

Importance and limits of the contribution of sciences

We also bore in mind the irreversible trend towards explicit modelling in material and life sciences and in their teaching [START_REF] Lange | Rencontre entre deux disciplines scolaires, biologie et mathématiques : première approche des enjeux didactiques de la formation des enseignants de biologie[END_REF][START_REF] Martinand | Apprendre à modéliser[END_REF]. Modelling is not always explicative and it can then perform functions of prediction, decision support, assistance in understanding and therefore in conceptualisation and problematisation (representation, clarification, deduction or argumentation), overcoming obstacles (discontinuity, variability, etc.). All are critical functions for exploring consequences, conditions and opportunities for sustainable development.

Vulnerability and risk

Science education has rarely insisted on the fact that sciences do not produce certainty. As is stressed by [START_REF] Christensen | Risk and school science education[END_REF]: "School sciences, however, has rarely acknowledged the uncertain dimensions of science and there now seem to be important consequences of failing to do so. It is in relation to decision making where scientific knowledge is uncertain that risk understanding can make a significant contribution."

Precisely because there is uncertainty, sciences should place importance in their ability to reduce the uncertainty in determining the causes, and in suggesting rational methods of risk assessment by assigning them a probability necessary for the "decisions makers" to take action. But we must also recognize the uncertain nature of "doing" science and anchor it into society by giving science the place it deserves in the debates related to socio-scientific issues. Jenkins (2000) emphasizes the need to bridge the gap between a societal development of ever more uncertain and complex nature and a scientific education aimed more often at the development a belief in the power of science, which is a scientistic achievement. The challenge to science education is considerable and the question of the risk is the opportunity.

Science has long contributed to the determination of risks, but this view of the risk/vulnerability relationship has evolved considerably in recent years [START_REF] Magnan | La vulnérabilité des territoires littoraux au changement climatique : mise au point conceptuelle et facteurs d'influences[END_REF]. In the 1950s, risk was addressed in the form of a 'physical paradigm': the hard sciences (geology, etc.) dominated the work. Then in the 1980s, a second school of thought was organised around a 'structural paradigm': risk becomes an encounter between a hazard and vulnerability, and social sciences become more important. But they remain different approaches and ways of thinking in terms of complementarity with the hard sciences. This approach ultimately proved insufficient to explain differences in vulnerability between human groups. In the 2000s, a new paradigm, that of 'reciprocity' between hazard and vulnerability, leads to a dynamic, evolving vision of the relationship between humans and their environment and therefore risk, vulnerability and disruption, anchored in a given territory. The triple dimension of disruption/land/vulnerability replaces the traditional hazard/vulnerability approach and science can only enlighten the alea and the notification of a probability to the risk. It calls for complex approaches in which universal sciences and humanities and social sciences must learn to diversify in their focus and approach.

It is now recognized that two registers of risk perception come face to face: a scientific perception, most often expressed in terms of probability; and a social perception, often qualified of "irrational", dependent on the territorial affiliation and the feeling of vulnerability of the risk. These two registers define the acceptability of risk (Faucheux and Nicolai, 2005). However, little work is taking into account these two registers and the diverse approaches being called upon [START_REF] Deram | Evaluation et acceptabilité des risques environnementaux[END_REF]. Thus, Chevassus-au-Louis (2000, 2007) specifies this important distinction: the "experts"' idea of risk is grounded in scientific rationality and defined in a quantitative and probabilistic manner. Another is the assessment of risk by citizens: the latter, considering the risk according to a "secular rationality", should not be confused with irrationality, according to qualitative criteria. There is a potential conflict of rationality that may be resolved appropriately by means of the democratic debate and of the precautionary principle. Education in SD must therefore mobilize scientific education and humanities, and prepare the actors for democratic deliberation within particular contexts.

Prediction and prospection

We should make a clear distinction between prediction and prospection. The prediction function of scientific models is a product of a process of extrapolation based on a particular model. However, it is often found in the gap between prediction and fulfilment that there is room for scientific problematisation/conceptualisation. The models however make it possible to identify some unsuspected issues at stake, the parameters and their importance. This determination leads to a determination of the mechanisms for action. Prospection meanwhile aims to determine possibilities in the form of scenarios developed on the basis of the available data. It is based on a complex analysis of the status quo and involves various models from different disciplines, including humanities and social sciences, without being limited to one of them [START_REF] Mermet | Prospectives pour l'environnement : quelles recherches ? Quelles ressources ? Quelles méthodes[END_REF]. It is therefore a process of supporting decisionmaking. If it is based on scientifically established data, it suggests decision-making procedures that transcend the science: prospection uses qualitative and quantitative methods and involves an element of the creative imagination of speculation. It aims to update the intersections of forces, trends, contradictions and tensions and offers an opportunity to clarify the underlying values [START_REF] Lange | Education au développement durable et éducation scientifique : Repères pour un curriculum[END_REF].

The contribution of the sciences to SD must therefore be considered in terms of the construction of a reality and the development of options they allow. But they alone cannot meet the requirement of ESD. Sciences and humanities and social sciences are together at the heart of sustainability issues: it is indeed a question of the contribution to the reduction of vulnerabilities, not just of the understandability of hazards, dangerous conditions and causes involved. On one hand, without this progression to action, pupils are likely to lapse into mainstream inhibition. On the other hand, the customary division of ESD issues into subjects and disciplines seems increasingly untenable.

Proposals

The full results and analysis thus lead us to distinguish three possible methods in ESD: 'nondisciplinary' educational actions of participation in SD, the contribution of scientific disciplines, and complex investigations of the issues at stake. If their connection is not obvious, these three methods are for all that necessary to fulfil the missions developed, work on the scalar dimensions of SD systematically, delineate and understand the issues at stake, develop solutions collectively through the determination of the mechanisms for action, providing the opportunity for education to participate in reducing the vulnerabilities of our societies and to prepare pupils for their role as social actors.

We propose a consideration of these three methods in successive moments, mobilising scientific models and concepts, prospective scenario approaches and collective actions. This approach corresponds for science education to Rogers' 'Vision II'. But we add to it by highlighting the ability to act on the world that science and technology, combined with the rhetorical requirement of ethical debate, give us. As [START_REF] Fourez | Constructivisme et justification éthique[END_REF] argues:

"Focusing on situations of trial and negotiation, [this dual requirement] makes it possible to "record new facts" that are not under the technocrats, and to "describe the operations of justification, denunciation or compromise".

The complexity of the issues in education for sustainability implies two strong recommendations: to admit the incompleteness of the disciplines and the risk that they will naturalise SD issues, and to implement a necessary cooperation between the sciences and humanities.

Figure 1 :

 1 Figure 1: Posters produced by the pupils of project 1 (primary school)  Project 2

  constraint NB: + notify a positive change; = notify an unchanging state; -notify a regression  Project 3 Table 2: Dynamics at work in the pupils (High school) Pupils Change & Synthesis (Construction of a reasoned opinion , propensity to act, support for the new academic format) RJU

''

  It's for all time, for now and for later' "10 years from now if we keep on throwing rubbish away the earth will die" Well yes if everyone does it, it could maybe change a bit…well, not totally'

Figure 2 :

 2 Figure 2 : vulnerability and science contribution

Table 1 :

 1 Dynamics at work in the pupils (Middle school)

	Pupils Change & Synthesis
	(

Construction of a reasoned opinion, propensity to act, support for the new academic format) RSy

Appendix: individual analysis grid

Pupil

Interview Tx Total number of words Number of answers Average number of words per answer

The relationship between the total number of words and the number of answers varies with the complexity of speech

Answers without verb

The number of answers without verbs and complex answers is related to the ownership of the issues and the complexity of thinking Complex answers Complexity indicators If Because While How Taken from the work of Boisseau, these help to validate the previous parameters. However, in terms of structure, oral speech is relatively poor at these ages. These will therefore have to be refined. We retain here the indicators of reasoning.

Uni-or multi-dimensional thinking

Speech referenced in several dimensions of rationality indicates the complexity of thinking, the ownership and the state of conceptualisation of the issues at stake.

Belief in the role of scientists 1. information 2. solution 3. raising the problem This belief is crucial for a citizen action: it leads either to passivity (waiting for solutions) or to action (raising the problem).

Number of Je ('I')

On (= 'we'), nous ('we') On (= generic) Ils ('they'; = others) An increase in je ('I') or on/nous 'we' relative to an impersonal discourse indicates an ownership of the key questions in SD. Ils ('they'), the others, indicates a certain passivity.

Relationship to others

Determinant of citizenship: 'I alone can do nothing' may prove to be an obstacle (social obstacle), 'I with others' is the condition for possible active citizenship The pupil understands, or not, the interest of addressing SD at school and the necessity to act now.

He supports this education project

Attachment to the method implemented Pupils are in a 'tourist' or 'utilitarian' relationship, or in a 'dynamic of personal development' (Caillot, 1999).

The pupil supports the non-customary methods implemented (debates, concrete actions, questionning, etc. ) or is awaiting more usual school work (class work through transference, lessons to learn, exercices, assessment, etc.) Relationship to learning: 1. learning for himself 2. learning involved in the world By this the pupil expresses his attachment to cumulative learning and reifies or instead to a learning to understand and act in the world.

Recurrent lexical field

General tone of speech represented by recurrent formulas Summary Possible obstacle E.g.: Dual thought, social fatalism, epistemic fatalism, supporting or not the new academic format involved.