Reflection: Checks for Understanding Drawing Bar Models to Represent Percents of Increase and Decrease - Section 3: Bar Model Practice


I provided a 10% bar model and a 25% bar model as examples to simplify the work.  While I was walking around observing students working, I was happy to see that several students were able to use other models.  On problems 3, 8, and 9 several students used a 20% bar model.  That is what I would use myself so I was glad to see it being used even though I didn't introduce it.  

For problem number 4 - a 50% increase - I saw a few different models.  I purposely choose this value to see whether students would use the 10% or 25% model.  Many choose on of these models and some chose a 50% model.  

  Other Bar Models
  Checks for Understanding: Other Bar Models
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Drawing Bar Models to Represent Percents of Increase and Decrease

Unit 5: Percent and Proportional Relationships
Lesson 5 of 15

Objective: SWBAT model percents of increase and decrease using bar models

Big Idea: Students practice drawing bar models for percent increase and decrease problems.

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4 teachers like this lesson
Math, Number Sense and Operations, Percentages, percent increase, percent decrease, bar models
  40 minutes
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