Addition Within 20
This strategy is for students who may have memorized some addition facts, but are not fluent in addition facts with sums between 10 and 20, do not show an understanding of addition and its relation to subtraction, or have enough number knowledge or flexibility to solve unknown addition problems.
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Other resources
Add20: Conceptual Understanding Pretest (Fillable PDF)
Page 113
Add20: Accuracy Posttest
Page 152
Add20: Accuracy Pretest (Fillable PDF)
Page 114
Add20: Answer Keys
Pages 156-169
Add20: Conceptual Understanding Posttest (Fillable pdf)
Page 151
4 files
Add20: Fluency A, B, C, and D (Fillable pdf)
Page 147-150
Add20: Fluency Posttest (Fillable PDF)
Page 153
Add20: Fluency Pretest (fillable PDF)
Page 115
Add20: Learning Contract (fillable pdf)
Page 119
12 files
Add20: Learning Sheets(Fillable PDF)
Page 120-138
Add20: Problem Solving Posttest (Fillable PDF)
Page 154
Add20: Problem Solving Pretest (Fillable pdf)
Page 116
Add20: Supplemental Learning Sheets Lessons 13-20 (Fillable pdf)
Pages 139-146