This book of mind-building algebraic thinking puzzles makes understanding equations and solving word problems easy and fun. Introducing algebra through balanced scales is a natural and exciting way to conceptually master fundamental algebraic ideas. The book's visually-simple approach engages students intuitively in step-by-step thinking. The puzzle-like problems ensure students are cognitively involved while they hone their techniques of simplifying, substituting, and writing proofs to solve simultaneous equations. Designed to move from simple to complex, with lessons scaffolding on earlier learning. Includes teaching suggestions and solutions. Reproducible paperback has 64 pages. For grades 4-12.