Algebra-for-All Policy Harmed High-Achievers, Study Finds - Curriculum Matters - Education Week

In some ways this article is about detracking and the concerns that high-achieving students might suffer when placed in classes with lower-achieving students. (I believe the research on this is mixed.) More importantly, this article stresses that teachers didn't receive any special training to teach algebra any differently to reflect the diversity of skill in their classrooms, and that may be the cause of the problems.