Lesson 2

Nombremos partes como fracciones

Lesson Purpose

The purpose of this lesson is for students to partition shapes into equal parts and express each equal-size part as a unit fraction.

Lesson Narrative

Previously, students partitioned rectangles that each represented 1 into fractional parts by folding. They now draw lines to partition a shape and use the fraction notation they learned to label each part as a unit fraction and describe a shaded part as a unit fraction. This lesson is the first time that students work with fraction strips, which will be used multiple times in the unit.

• Engagement
• MLR8

Learning Goals

Teacher Facing

• Express the area of each part as a unit fraction of the whole.
• Partition shapes into halves, thirds, fourths, sixths, and eighths.

Student Facing

• Usemos fracciones para describir partes.

Required Materials

Materials to Copy

• Partition the Strips, Spanish

Required Preparation

Activity 1:

• Use the blackline master to create one set of 6 equal-sized strips for each student.

Building On

Building Towards

Lesson Timeline

 Warm-up 10 min Activity 1 15 min Activity 2 20 min Lesson Synthesis 10 min Cool-down 5 min

Teacher Reflection Questions

What student strategies surprised you in today’s lesson? How will you build on those strategies as students develop ideas about fractions?

Suggested Centers

• Mystery Number (1–4), Stage 2: Three-digit Numbers (Supporting)
• Number Line Scoot (2–3), Stage 1: Twos, Fives, and Tens (Supporting)