It's a fact！ When your child understands and develops key skills， math can be more fun and a lot less stressful。 In Addition & Subtraction Grades 1-2 Deluxe Edition， you'll find hundreds of math facts for fast， fun learning， with clear instructions and step-by step examples for you and your child to follow。 The workbook is aligned with the Common Core State Standards for Mathematics a comprehensive and progressive set of learning objectives created to help students succeed in math。 At the bottom of each workbook page is a cross-reference to the Common Core grade level and "domain" or skill area that the activity practices。 The workbook is also consistent with Principles and Standards for School Mathematics， a publication by the National Council for Teachers of Mathematics （NCTM）， and it is compatible with Singapore math pedagogy。 The lessons are planned in learning sequence; skills introduced in one lesson build on those taught in previous lessons。 It's a perfect way to introduce， review， and maintain essential math skills。 Get a math edge with the School Zone Advantage！