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Not just a resource book, this program presents mathematical concepts, via rods, to small children. Activities progress from the concrete level to the pictorial level to the symbolic (numerical) level and cover a wide range of concepts, including basic operations. By using a variety of approaches, children are led to discover that there is more than one way to solve a problem. The book is clear and easy to use, with complete lesson plans (one lesson per page) including materials needed, setting, teaching instructions, underlying mathematical concepts, and appropriate age level. Each facing page contains either a photograph or colored illustration depicting the use of rods in the lesson. A good way to get started with rods!