Requiring the commissioner of education to establish a system for +assessing the school readiness of children entering kindergarten based on certain +school readiness studies conducted by the department and to set biennial +milestones for progress in the number of children reaching proficiency; +providing for implementation in school districts on a voluntary basis according to +a certain specified schedule; requiring the commissioner to evaluate the +effectiveness of the data gathering system for implementing developmental assessments +at kindergarten entrance on a school by school basis, requiring biennial+ progress reports to the legislature (je)