The Georgia Department of Education released the 2015 ratings for local schools on May 3, 2015. The ratings, called the College and Career Readiness Performance Index or CCRPI, are based largely on student performance on state standardized tests, but also include other factors. Here are Georgia's top 10 schools, starting with... No. 1 -- Gwinnett School of Mathematics, Science and Technology (Gwinnett County) -- CCRPI Score: 108.4.