Lesson 1
One Piece of One Part
Lesson Purpose
Lesson Narrative
In the previous unit, students found the product of a whole number and a fraction or mixed number, using tape diagrams and area diagrams. This unit continues that work to include products of two fractions. The goal of this lesson is for students to investigate fractions of fractional quantities in context. The focus is on interpreting representations in terms of the context (MP2). In later lessons, students will see that the diagrams can be represented by multiplication or division expressions.
In the first activity, students draw and explain their own representation of a situation involving macaroni and cheese. Students’ representations may differ so the discussion focuses on how their diagrams represent the situation. The second activity focuses on area diagrams like students worked with at the end of the previous unit. This lesson prepares students to relate diagrams to expressions in the next lesson.
 Action and Expression
 MLR2
Learning Goals
Teacher Facing
 Represent and interpret a unit fraction of a unit fraction in ways that make sense to them.
Student Facing
 Let’s solve problems about unit fractions.
Required Preparation
CCSS Standards
Lesson Timeline
Warmup  10 min 
Activity 1  20 min 
Activity 2  15 min 
Lesson Synthesis  10 min 
Cooldown  5 min 
Teacher Reflection Questions
Suggested Centers
 Rolling for Fractions (3–5), Stage 2: Multiply a Fraction by a Whole Number (Supporting)
 Five in a Row: Multiplication (3–5), Stage 4: Three Factors (Supporting)
Print Formatted Materials
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Additional Resources
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