A 2011 study done by the National Center for Education Statistics found the following statistics for first-time kindergarten students:
- Older students scored higher than their younger classmates on reading, mathematics and science assessments.
- A positive age difference of as little as six months showed an increase in reading, mathematics and science assessments scores.
- The GPA for students who had attended a child-initiated preschool was 14 percent higher than those who attended an academically directed preschool.
- In eight out of the 11 subjects studied, students who attended child-initiated preschools outperformed students who attended academically directed preschools.
- 76 percent reported that children in their classrooms spent more than one hour per day on literacy instruction; 34 percent reported spending 90 minutes or more on literacy instruction
- 79 percent reported spending class time every day on standardized testing or test preparation
- 14 percent reported having no outdoor recess time
- 92 percent reported that children in their classrooms spent more than one hour per day on literacy instruction; 62 percent reported spending 90 minutes or more on literacy instruction
- 82 percent reported spending class time every day on standardized testing or test preparation
- 2 percent reported having no outdoor recess time