This article begins with three brain teasers, and the answers, provided at the end of the article, may prove surprising. Figuring out why they are correct leads the reader to delightful "aha" moments. The kinds of "aha!" moments that result from solving these challenges for yourself were held in high estimation by the person…

Several computer games are reviewed with respect to how they might be used within the classroom. The games detailed represent "families" that progress from the introduction of a concept to advanced games that help develop it. (MP)

An activity is described which can be used to introduce students to the general divisibility test for nine. (JP)

Using play money, students buy and sell six types of stock certificates at prices determined periodically by tossing three dice; all students participate as investors, brokers, or banker. In addition to gaining practice on computational skills in a motivational game, students study the real stock market concurrently. (SD)

Educational activities based on easily constructed peg games are detailed, along with advice on how they can be constructed. The activities are designed to guide students to collect and organize data; recognize, extend, and generalize patterns; and develop problem-solving strategies. (MP)