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 ...

What They Need To Know: In Math, children use addition, subtraction, multiplication, and division to solve word problems. They tackle measurement of volume, mass, and time. They learn more about ...