Document Excerpt 8: Summary of Operations & Algebraic Thinking in Grades K-2 (Pages 20-21) icon
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Excerpt 8: Summary of Operations & Algebraic Thinking in Grades K-2 (Pages 20-21)

Progressions for the Common Core State Standards for Mathematics

Draft K Progression on Counting & Cardinality and K-5 Progression on Operations & Algebraic Thinking

Supporting grades: K12345

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. Students represent these problems with concrete objects and drawings, and they find the answers by counting (Level 1 method). For Put Together/Take Apart with Total Unknown, they make or draw the two addend sets, and then they count the total number of objects to give the answer. But as a general method they learn how to find answers to these problems by counting on (a Level 2 method), and they understand and use this method.

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Excerpt 7: Operations & Algebraic Thinking in Grade 2 (Pages 18-19)

Draft K Progression on Counting & Cardinality and K-5 Progression on Operations & Algeb...

Progressions for the Common Core State Standards for Mathematics

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Excerpt 9: Operations & Algebraic Thinking in Grade 3 (Pages 22-28)

Draft K Progression on Counting & Cardinality and K-5 Progression on Operations & Algeb...

Progressions for the Common Core State Standards for Mathematics