The Crusades sounds like a glamorous time period in the Middle Ages full of glory—but was it? Scholars find and review the truth of the Crusades' influence on the world through the resource. The study guides, separated individually by...

Clean up the environment with a instructional activity that focuses on replacing hazardous cleaning supplies with green, environmentally-friendly products. Using a dirty patch of surface as a control area, kids clean other parts of...

Find the common denominator between prime factors, factor trees, and the distributive property. Scholars learn to find the least common multiple and greatest common factor of pairs of numbers. They rotate through stations to connect...