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Characteristics of Participating Study Schools and All California Public Schools: May–November 2011
| Characteristic | Participating Schools (n = 240) | California Public Schools (n = 10 152) |
| Student enrollment, mean | ||
| Elementary | 536 | 530 |
| Middle or junior high | 808 | 806 |
| High | 1343 | 1404 |
| Academic performance index, mean | 776 | 768 |
| Students qualifying for free or reduced-price meals, % | 53 | 55 |
| English learners, % | 20 | 22 |
| Latino students, % | 46 | 51 |
| School age, y, mean | 48 | N/A |
