You are here

Session 4 - Strategies to Add and Subtract within 20

Strategies to add and subtract within 20 - Grade 1

Progress Monitoring:

Directions: Subtraction Sets Progress Check (Slide 40) (10 minutes)

  1. The progress check is used to assess or evaluate students’ understanding and demonstration of subtracting using the making a ten strategy. 
  2. The facilitator will use the progress check to identify if more practice should continue with subtraction before administering the post-assessment, which includes both addition and subtraction sections. 
  3. Answers are included in the Progress Check.
  4. Print the activity for each student.
  5. Read aloud the directions, if needed.
  6. Students will be asked to “draw a number” meaning they make a visual representation of the numbers being calculated.
  7. Record the student’s scores on the progress check, which will determine mastery of the strategy or if there is a need to reteach the strategy.

Decorative question mark:

Why are students doing this/what are they getting out of it? 

The progress check is used to assess or evaluate students’ understanding and demonstration of adding and subtracting using the making a ten strategy. The facilitator will use the progress check to identify if more practice should continue with addition before moving to part 2 which is focused on subtracting. 

Step 4

Connect: Closing the Lesson (5 minutes):

Activity: Addition & Subtraction Presentation Slides

Activity: Addition & Subtraction Presentation Slides (Slide 41)

Directions for Giving the Task:

  1. Debrief: Students will gather back together. 
  2. Ask them to reflect on the lesson’s guiding question: How can you use only 10 fingers to calculate totals up to 20?
  3. Students will share their learning of the different strategies presented in this toolkit.  The question prompts on the slide will guide students into reflecting on the strategies they liked, which worked well for them, which ones their peers prefer and their reasoning for those choices.

Focus: MP 1: Make sense of problems and persevere in solving them.

Please Note

Decorative pencil icon

If this activity seems to be taking a long time, this would be a good breaking point for the final assessment to check for understanding.