The importance of fractions and division for long-term mathematics learning was evident in both data sets, despite the data being collected in two different countries almost 20 years apart.

With the possible exception of fractions, no elementary math topic or skill stresses students out more than long division does. And it’s so unnecessary--not just the stress, but the skill.

A fifth-grader’s understanding of fractions and long division predicts their knowledge of algebra and overall math achievement in high school, according to new research published in the journal ...