Benchmarking education systems	Schools in original sample	Eligible schools in original sample	Schools in original sample that participated	Substitute schools	Total schools that participated	Sampled students in participating schools	Students assessed
Alberta-CAN	150	147	143	2	145	4,292	3,789
Ontario-CAN	200	191	188	1	189	4,932	4,561
Quebec-CAN	200	197	189	1	190	4,529	4,244
Maltese-MLT	99	95	95	0	95	3,942	3,548
Andalusia-ESP	150	150	149	0	149	4,652	4,333
AbuDhabi-UAE	168	165	164	0	164	4,308	4,146
Dubai-UAE	152	139	138	0	138	6,497	6,061
Florida-USA	81	80	77	0	77	3,052	2,598