A MiddleWeb Blog I have been giving a lot of thought to common math errors lately. Our high school is judged on how well students perform on the ACT. To help them prepare, I have been giving ACT type multiple choice questions as bell ringers (warm-ups), and it has become very clear that my students are making some pretty common errors on a regular basis. Unfortunately, the ACT (and other standardized tests) are structured to take advantage of those mistakes…