Database: 2015-16 NC school performance

State education leaders released Thursday the school performance results for the 2015-16 school year. The General Assembly requires every North Carolina public school to receive an A through F performance grade.

The grades are based on standardized end-of-grade tests in reading and math for grades three through eight, science in grades five and eight and end-of-course tests in three school subjects. High schools are also evaluated on their graduation rate, ACT and ACT WorkKeys results and percentage of students who complete Math III.

What do the numbers mean?