Sample Group	Some Year 1 Head Start Participation	No Year 1 Head Start Participation	Total
All Randomly Assigned (N=4,667):
3-Year-Old Cohort
Head Start Group	85.1%	14.9%	100%
Control Group	17.3%	82.7%	100%
4-Year-Old Cohort
Head Start Group	79.8%	20.2%	100%
Control Group	13.9%	86.1%	100%