On his website andertoons.com, illustrator Mark Anderson has a cartoon in which a boy is handing his teacher an assignment. “To show how well I understand fractions,” he says, “I only did half of my ...

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 ...

For instance, \(\frac{2}{9} + \frac{3}{9} = \frac{5}{9}\) or \(\frac{6}{11} - \frac{4}{11} = \frac{2}{11}\). Work out \(\frac{4}{7} + \frac{1}{3}\). Create a common ...

A key part—though surely not the only part—of early-grades math is ensuring students get the basic arithmetic functions down and, beyond that, making sure they’re able to swiftly and automatically ...