Reflection: Modeling Determine Equivalent Ratios - Common Unit Rate - Section 1: Introduction


I'm glad we took time to discuss the unit rates of a rate, or that there are 2 unit rates per rate.  Is this recursive? Anyway, it was interesting to look at the differences between 2 inches of rainfall per hour vs 0.5 hours per inch of rain.  Either unit rate could be used to determine if the rates are proportional but they convey different meanings.  We then noticed that if a problem is asking for a particular rate like inches per hour, the order of the words tells you how to divide - inches divided by hours.  In later parts of the lesson students would still find the "wrong" unit rate.  We could fall back on this discussion as this occurred.


  Two Unit Rates per Rate
  Modeling: Two Unit Rates per Rate
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Determine Equivalent Ratios - Common Unit Rate

Unit 2: Proportional Relationships
Lesson 9 of 12

Objective: SWBAT determine if quantities in a table are in a proportional relationship by comparing unit rates

Big Idea: If a set of ratios share a common unit rate, the ratios are equivalent.

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Math, Number Sense and Operations, proportional relationships, unit rate
  50 minutes
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