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Digit the Clown and Cecilia the Seal are your child's hosts in this 2015 revision. Students will deepen their number sense as they develop an understanding of place value by practicing addition and subtraction. Other topics include measurement, geometry, as well as time and money concepts. The text also introduces skills for writing equations, reading graphs, and solving word problems. New chapters developing the concepts of plane figures as well as graphs and charts have been added to this edition. Chapters include a chapter review and cumulative review. Paper Manipulatives are used in this hands-on approach to math, and are the same manipulatives as used in the K5 program. Unifix cubes are also recommended in Grade 1, but a good supply of Legos® will also work. Not compatible with other editions.