Learn all about addition and subtraction with regrouping with this 6 week, hands-on math unit for 2nd grade. This unit is the sequel to the Addition and Subtraction without Regrouping unit, but may be used on it's own. This unit includes full lesson plans, student task cards, games, and recording sheets. It is designed to be used as week long, centers-based exploration units. Weeks 1 and 2:Monday: Build schema and review addition strategies. Tuesday-Thursday: Students will visit a series of