Reflection: Intervention and Extension Finding Missing Parts of 10 - Section 3: Independent Practice


Several of my students did not understand how to solve their problems by drawing and counting up.  The resource section shows me intervening with one student to show her a different method to solve her problem.  Instead of counting up, I had her start with the whole number the problem presented, which was 10 and draw all 10 people.  Then I had her circle the amount that was in the sand, then she could see how many were left over that must be swimming. It is very important to walk around during independent practice time to try and catch misunderstandings as they occur, intervene, and then extend their knowledge by offering a new method to solve the same problem. I always tell my students the great thing about math is there is always more than one way to get the answer.

  Intervention and Extension: Student Intervention
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Finding Missing Parts of 10

Unit 4: Understanding Subtraction
Lesson 10 of 10

Objective: SWBAT find missing parts of ten through drawing.

Big Idea: First graders love to draw and I want them to use their artistic abilities to illustrate word problems. Illustrations can help students identify the unknown parts of a problem.

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Math, Number Sense and Operations, subtraction, First Grade, count on, difference
  30 minutes
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