Lesson 15
Compare Fractions with the Same Denominator
Lesson Purpose
The purpose of this lesson is for students to compare two fractions with the same denominator.
Lesson Narrative
In previous lessons, students learned that fractions are built from unit fractions. Here, they reason that fractions with the same denominator are composed of parts that are the same size or length, so the numerator, which describes the number of parts, determines which fraction is greater. It is important that students have the opportunity to develop this understanding rather than learning a rule about comparing fractions with the same denominator.
Students are reminded that they can use the symbols >, =, or < to record the results of comparison of fractions, just as they did with whole numbers in earlier grades (MP6). This lesson (including the cool-down) enables the teacher to gauge students' familiarity with the symbols, but students are not yet expected to rely on the symbols to express comparison.
- Representation
- MLR7
Learning Goals
Teacher Facing
- Compare two fractions with the same denominator by reasoning about their size.
Student Facing
- Let’s compare two fractions with the same denominator.
Required Materials
Materials to Gather
Materials to Copy
- Spin to Win Recording Sheet
- Spin to Win Spinner
Required Preparation
Activity 2:
- Each group of 2 needs a paper clip for their spinner.
CCSS Standards
Addressing
Lesson Timeline
Warm-up | 10 min |
Activity 1 | 20 min |
Activity 2 | 15 min |
Lesson Synthesis | 10 min |
Cool-down | 5 min |
Teacher Reflection Questions
What prior knowledge about unit and non-unit fractions did you see students use to help them compare fractions?
Suggested Centers
- Rolling for Fractions (3–5), Stage 1: Equivalent Fractions (Addressing)
- Number Line Scoot (2–3), Stage 3: Halves, Thirds, Fourths, Sixths and Eighths (Addressing)
- Five in a Row: Multiplication (3–5), Stage 2: Factors 1–9 (Supporting)
Print Formatted Materials
For access, consult one of our IM Certified Partners.
Additional Resources
Google Slides | For access, consult one of our IM Certified Partners. |
|
PowerPoint Slides | For access, consult one of our IM Certified Partners. |