From the ECS State Policy Database: P-3 Kindergarten--Full-Day Kindergarten - This policy database—updated weekly—is made possible by your state's fiscal support of the Education Commission of the States....

Inequalities at the Starting Line: State Kindergarten Policies PDF - The Education Commission of the States (ECS) reviewed policies across all 50 states—policies that ECS believes are significant markers in the quality of a state's kindergarten program. The kindergarten report's findings highlight the significant diversity that exists in state kindergarten policies across and within states. The results reveal a system of providing the next generation with high-quality, full-day, everyday kindergarten that is highly unequal across the states. The goal of the report is to illustrate the implications of the presence of such diverse kindergarten policies, to raise questions about the implications of that diversity, and to encourage policymakers to consider the impact their state's policies have on children's future educational success. (Emily Workman, ECS, March 2013)...

Online Kindergarten Database - In this database, you will find kindergarten state policy information for all 50 states. Topics include entrance ages, curriculum, standards, class size, and much more. (ECS, 2013)...