standard_description: Fluently add and subtract within 20 using mental strategies. (See standard 1.OA.6 for a list of mental strategies.) By end of Grade 2, know from memory all sums of two one-digit numbers.
problem_activity: Stage 3: Represent
Required Preparation
Materials to Gather
Crayons
Cups
Two-color counters
Materials to Copy
Blackline Masters
Shake and Spill Stage 3 Recording Sheet Kindergarten
Shake and Spill Stage 3 Recording Sheet Grade 1

Narrative
Students decide together how many counters to use (up to 10). One partner spills the counters. Both partners represent the red and yellow counters on the recording sheet.
This stage has two different recording sheets, one for kindergarten and another for grade 1. Be sure to use the appropriate recording sheet with students.
Additional Information
Each group of 2 needs a cup and 10 two-color counters.


aligns: no