We’ve heard some “spin” lately about ACT scores, and we think this article provides some helpful insight. We also note that ACT scores are periodically “recentered” and that starting with the graduating class of 2013, ACT Inc. began “including both standard-time and extended-time test takers in its annual report. This change has the effect of both reducing mean ACT scores and increasing the number of seniors included in the statistics.” (A (Mostly) Brief History of the SAT and ACT Tests).
http://www2.ljworld.com/weblogs/first-bell/2013/aug/22/the-spin-begins-on-act-scores/