Performance index: A subset of Achievement, this is the most detailed measure of state test performance. It goes deeper than just a "yes or no" on proficiency, giving more credit for the highest performers and less credit for lowest scorers to create an overall score.
» SEARCH: How did your school perform on the 2016-17 state report card?
Progress: Judges whether students made one year's worth of academic growth from last school year. One year of growth equals a "C" grade. Generally, it is based on what statewide percentile students score in each year.
Gap closing: Reports whether each subgroup of students (by race, economics, disability, etc.) narrowed achievement gaps when compared with the student body as a whole.
» REPORT CARD: Clark, Champaign schools score low for achievement on report cards
Graduation rate: Shows diplomas earned within four or five years of starting ninth grade. The four-year rate measures students who would have normally become the class of 2016. The five-year rate measures the class of 2015.
» RELATED: Many local "A's" for student growth; Dayton scores mixed
K-3 Literacy Improvement: Measures what percentage of struggling readers get back on track to proficiency between kindergarten and third grade. Schools with less than 5 percent of kindergarteners scoring below grade level are not graded.
Prepared for Success: Tries to measure how well prepared students are for the future, via ACT/SAT scores, honors diplomas, industry credentials and participation in college credit-bearing programs.