Prairie Lakes Area Education Agency

Fall Progress Monitoring & Instructional Strategies for 2.OA.2

Add and subtract within 20.
Fluently add and subtract within 20 using mental strategies. By end of Grade 2, know from memory all sums of two one-digit numbers.
Consider targeted instruction if student cannot fluently add and subtract within 10.
Progress Monitoring: Ask to solve add/ subtract problems within 10. i.e., 0+9=9, 9-4=5, 5+3=8  Counting is not considered a fluent strategy for addition or subtraction when working on fluency.
Instructional Activities
Number Talks by Sherry Parrish, Chapter 4: How Do I Design Purposeful Number Talks in the K-2 Classroom?
Developing Number Concepts: Addition and Subtraction: Book 2, Chapter 3: Developing Strategies for Adding and Subtracting by Kathy Richardson
Teaching Student-centered Mathematics, by John Van De Walle: Chapter 5: Base Ten Concepts and Place Value; Chapter 6: Strategies for Whole Number Computation
K-5 Resources: Math Teaching Resources website:
(From 1st Grade)
Turn Around Dominoes:
Turn Around Trains:
Subtract from Ten:
Tens and Ones with Snap Cubes:         
Build a Train:

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