Who knew the sum of a number's digits gives such interesting information? The 18th installment of a 21-part module has scholars investigate division by three and nine. After looking at several examples, they develop divisibility tests...

Your fifth graders will appreciate the simple, direct explanations, examples, and practice exercises in this well-organized unit on fractions. Beginning with an introduction to fractions, the packet flows smoothly through the fraction...

What is a Leap Year and why do we have it? Find out with this Leap Day/Leap Year response to reading worksheet in which scholars read a short passage and use their new-found knowledge to answer five questions with short...