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Excerpt 5: Addition and Subtraction Situations by Grade Level (Page 9)
Progressions for the Common Core State Standards for Mathematics
Draft K Progression on Counting & Cardinality and K-5 Progression on Operations & Algebraic Thinking
Description: One of a series of documents describing the progression of a topic across several grade levels, informed both by research on children's development and by the structure of mathematics. These problems are a productive variation with two unknowns that give experience with finding all of the decompositions of a number and reflecting on the patterns involved.
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Excerpt 4: Operations & Algebraic Thinking in Grade K (Pages 8-11)
Draft K Progression on Counting & Cardinality and K-5 Progression on Operations & Algeb...
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Excerpt 6: Operations & Algebraic Thinking in Grade 1 (Pages 12-17)
Draft K Progression on Counting & Cardinality and K-5 Progression on Operations & Algeb...