Reflection: Rigor Unlike! Fractions, Not Facebook - Section 3: Guided Practice


Often times I think modeling is thought of as a way to help students who are struggling.  Sometimes when the students seem to "get it", we focus more on the abstract components of math and less on the concrete and modeling.

This lesson is an example of how using models increases the rigor of a lesson.  At this point, my students are able to convert two fractions to equivalent fraction with like denominators. The computations become almost automatic.  

Pushing students to represent their problem using models requires them to think about each fraction in relation to the whole, then comparing them using subtraction. 

Building a strong foundation here will help students have more clarity when multiplying fractions later.

  Modeling and Rigor
  Rigor: Modeling and Rigor
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Unlike! Fractions, Not Facebook

Unit 2: Adding and Subtracting Fractions
Lesson 8 of 11

Objective: SWBAT represent subtraction situations, for fractions with unlike denominators, using expressions, models, and computations.

Big Idea: Students create their own story problems for subtracting with fractions. They represent these expressions in multiple ways to demonstrate their understanding.

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Math, Fractions, Critical Area, Fraction Models, Writing in Math
  50 minutes
screen shot 2014 03 04 at 3 37 51 pm
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