The LPI review affirms the short- and long-term benefits of many preschool programs, particularly those that are high-quality and developmentally appropriate. Research shows that students who attend preschool programs are more prepared for school, have better early literacy and mathematics skills, and are less likely to be identified as having special needs. However, interpretations of the results often depend on the groups of students being compared.
When participants are compared to very similar students who did not attend preschool, the benefits of participation are found to be substantial. Both preschool and elementary school quality make a difference for the strength of ongoing effects in terms of school progress and attainment.