Fractions are thought by many in math education to be a central bottleneck that many students have trouble with, so much research has been directed at understanding the basic capacities essential ...

But students who had most of the math knowledge from previous grades, including the predecessor skills, did the best. They had a 58% success rate on new Algebra 1 content.

Less than a quarter of employees do any calculations more complicated than basic fractions, and blue-collar workers generally do more advanced math than their white-collar friends.

Middle school math is a formative period for building the foundations of math education for high school and college. Where are we losing students?