Lesson 17

Comparemos fracciones

Lesson Purpose

The purpose of this lesson is for students to compare two fractions with the same numerator or the same denominator in and out of context and to justify their conclusions.

Lesson Narrative

In previous lessons, students learned what it means for fractions to be equivalent, and compared two fractions with the same denominator or the same numerator. In this lesson, students apply their knowledge to compare fractions in and out of context and have an opportunity to generalize about what they have learned about fraction comparison.

• Engagement
• MLR8

Activity 1: Problemas de comparación

Learning Goals

Teacher Facing

• Compare two fractions with the same numerator or the same denominator.
• Record the results of comparison with the symbols >, =, or <.

Student Facing

• Comparemos más fracciones en diferentes situaciones.

Building Towards

Lesson Timeline

 Warm-up 10 min Activity 1 15 min Activity 2 15 min Activity 3 10 min Lesson Synthesis 5 min Cool-down 5 min

Teacher Reflection Questions

As you finish up this unit, reflect on the norms and activities that have supported each student in learning math. How have you seen each student grow as a young mathematician throughout this work? What will you continue to do and what will you improve upon in the next unit?

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)