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Mike Kenny didn’t intend to create an educational web app — he was just looking for a way to help students master their multiplication tables. In 2013, as a graduate student in the Vermont Mathematics ...

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 ...

Multiply by 7 using the grouping of objects, arrays, and facts you already know. Explore the Multiply by 7 facts using the grouping of objects and arrays. Compete against characters to see who finds ...

This summer, battle lines were drawn over a simple math problem: 8 ÷ 2(2 + 2) = ? If you divide 8 by 2 first, you get 16, but if you multiply 2 by (2 + 2) first, you get 1. So, which answer is right?