Reflection: Joy Addition Algorithm Rote or Understanding - Section 3: Independent Practice


The students seemed to enjoy the game. They had to stop and think if the two cards were similar but there was a lot of team work. Students looked at the cards together and decided if the two were related. It allowed students who were having some difficulty to learn from their peers.  

When students were asked to work independently, several students showed that they did not clearly understand how the smiley face numbers were related to the given numbers. They could add the smiley face numbers in their heads, or by counting, and they could add tens and ones in columns, but they were not seeing the purpose for comparing the two.

I need to be clearer next time that my purpose is to provide a way to see if the answer they have found is actually close to the real answer. I need to help students to understand that checking their own work is a worthwhile step in showing that they understand a mathematical process and can use it when they need it to solve a problem. 

  Moving from the Game to the Paper and Pencil Task
  Joy: Moving from the Game to the Paper and Pencil Task
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Addition Algorithm Rote or Understanding

Unit 17: Getting Better at Addition and Subtraction
Lesson 9 of 12

Objective: SWBAT relate the addition algorithm to rounded estimates and understand that they are adding tens and ones, which are different units.

Big Idea: In part 1, students all were able to add two numbers presented vertically and relate each 2-digit number to the nearest 10. Today I need to check for understanding verses the rote application of the process.

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2 teachers like this lesson
Math, Number Sense and Operations, addition, estimation, algorithm, Operations
  60 minutes
100 0815
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