Lesson 3
Nonunit Fractions
Lesson Purpose
The purpose of this lesson is for students to understand nonunit fractions.
Lesson Narrative
Previously, students learned how to write unit fractions, using numbers of the form \(\frac{1}{b}\). They also partitioned rectangles and used unit fractions to describe one of the parts. In this lesson, students use diagrams with multiple equal parts shaded to make sense of how nonunit fractions are made of unit fractions.
Students learn that a unit fraction is a fraction in which the numerator is 1 because it describes one of the equalsized parts. They work with fractions that are equal to a whole number and fractions greater than a whole number to see that all nonunit fractions are built from unit fractions in the same way. Students also notice that if all the parts are shaded, then the nonunit fraction is equivalent to a whole number. The terms numerator and denominator are not used until the next section.
 Representation
 MLR8
Activity 1: Write and Read Fractions
Learning Goals
Teacher Facing
 Understand a fraction $\frac{a}{b}$ as the quantity formed by $a$ parts of size $\frac{1}{b}$.
Student Facing
 Let’s learn about nonunit fractions.
Required Materials
Materials to Copy
 Fraction Match Part 2
 Fraction Match Part 1
Required Preparation
Activity 2:
 Create a set of cards from the Fraction Match Part 1 blackline master for each group of 2.
 Create a set of 8 cards from the Fraction Match Part 2 blackline master for each group of 2.
CCSS Standards
Addressing
Lesson Timeline
Warmup  10 min 
Activity 1  15 min 
Activity 2  20 min 
Lesson Synthesis  10 min 
Cooldown  5 min 
Teacher Reflection Questions
How did students leverage their knowledge of unit fractions from previous lessons to make sense of nonunit fractions for the first time?
Suggested Centers
 Mystery Number (1–4), Stage 2: Threedigit Numbers (Supporting)
 Number Line Scoot (2–3), Stage 1: Twos, Fives, and Tens (Supporting)
Print Formatted Materials
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Additional Resources
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