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 ...

Many children never master fractions. When asked whether 12/13 + 7/8 was closest to 1, 2, 19, or 21, only 24% of a nationally representative sample of more than 20,000 US 8th graders answered ...