Georgia Milestones End-of-Grade measures how well students have learned the knowledge and skills outlined in the state-adopted content standards in English language arts, math, science, and social studies. Georgia Milestones is a single assessment system that consists of end-of-grade measures in English and math in grades 3-8, end-of-grade measures in science in grades 5 and 8, and end-of-grade measures in social studies in grade 8.