Michael Jenkins was skeptical when his parents signed him up for a summer academic program at Jamestown High School. But after he and his classmates solved algebra problems and plotted points on a ...

Multiply by 5 using the grouping of objects, counting by fives, and arrays. Explore the Multiply by 5 facts using the grouping of objects, counting by fives, and arrays. Compete against characters to ...

Empirical probability uses the number of occurrences of an outcome within a sample set as a basis for determining the probability of that outcome.

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 ...

Now that we've learned the basics of lightning fast mental addition, mental subtraction, and mental multiplication, it's time to turn our attention to a few tips that will help you take your skills to ...