Reflection: Backwards Planning Mixed Numbers - Section 3: Closer


I wanted to take a second to rationalize why I covered how to convert between mixed numbers and improper fractions.  Up until this point in the unit we have done extensive work in modeling fractions.  But, mixed numbers and improper fractions are something that students have been using since third grade.  The difference between the third grade fractions content and the fifth grade content is that students are required to add and subtract mixed numbers with unlike denominators.  Hence, they have to be able to change one from the other. 

Students find it easy to multiply the denominator by the whole number and add the numerator.  They do however struggle with verbalizing what 4 1/2 means.  So, rest assured in the next lesson in my unit, we are going to focusing more on the visual representation of mixed numbers.  Every once and while I like to give them the easy stuff first.

  Duly Noted
  Backwards Planning: Duly Noted
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Mixed Numbers

Unit 4: Adding and Subtracting Fractions
Lesson 15 of 17

Objective: The students will be able to add and subtract mixed numbers using models and equations.

Big Idea: I’m the principal now!

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