This document discusses using multiple measures of data over time to analyze changes in student demographics, school programs and processes, perceptions of the learning environment, and student learning outcomes. Collecting data on enrollment, attendance, test scores, ethnicity, gender, and grade level can provide insights into how the student population and performance is changing. Comparing this data to perceptions and observations of classroom environments, beliefs, and attitudes can help schools understand what programs and processes best support different groups of students and improve learning.