This report by REL Mid-Atlantic shows how stabilizing aggregate measures of academic proficiency and growth improves their reliability, especially for small groups of students. Stabilized measures can allow states and districts to better identify the schools and student groups in greatest need of support.This report by REL Mid-Atlantic shows how stabilizing aggregate measures of academic proficiency and growth improves their reliability, especially for small groups of students. Stabilized measures can allow states and districts to better identify the schools and student groups in greatest need of support. Read More