High school grade point averages are five times stronger than ACT scores at predicting who will graduate from college, according to a new study published last week in Educational Researcher.
The study was based on data from 55,084 students who graduated from the Chicago public school district between 2006 and 2009 and immediately enrolled in a four-year college. Across all high schools in the study, which included high schools with sharply differing performance, each incremental increase in GPA is associated with an increase in the odds of graduating college. The study did not find similar gains based on ACT scores.
ACT disputes the findings.