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

Standard:

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:

Turn Around Dominoes: http://www.k-5mathteachingresources.com/support-files/turn-around-dominoes.pdf
Turn Around Trains: http://www.k-5mathteachingresources.com/support-files/turn-around-trains.pdf
Subtract from Ten: http://www.k-5mathteachingresources.com/support-files/subtract-from-10.pdf
Tens and Ones with Snap Cubes: http://www.k-5mathteachingresources.com/support-files/tens-and-ones-with-snap-cubes.pdf
Build a Train: http://www.k-5mathteachingresources.com/support-files/build-a-train.pdf