Reflection: Backwards Planning Checking for Reasonableness Game - Section 3: Student Practice


In the middle of this lesson, I discovered two ways that this game could be improved. I simply shared out the solutions to problems mid-lesson. If I had composed this lesson using the backwards planning model, I think I would have found these problems prior to the lesson!

Problem #1: Some students included 2-digit, 3-digit, and 4-digit numbers ending in 0, such as 7000. Then, when they multiplied 7000 x 3, checking for reasonableness became pointless!

Solution #1: In order to make sure the game would help students meet today's math goal, I asked students to replace all numbers ending with 0.   

Problem #2: The game seemed to become a bit long. After playing for 15 minutes, students didn't get very far on the board. Students became less motivated because the end was so far off!  

Solution #2: I asked students to grab another die so that they could roll a pair of dice in order to advance on the game board.

  Game Improvements
  Backwards Planning: Game Improvements
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Checking for Reasonableness Game

Unit 11: Multiplication: Single-Digit x Multi-Digit
Lesson 7 of 8

Objective: SWBAT check for reasonableness when multiplying.

Big Idea: Students should be able to solve and illustrate multiplication problems using multiple strategies.

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1 teacher likes this lesson
Math, Number Sense and Operations, multiplication, checking for reasonableness
  100 minutes
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