Lesson 5

A la recta numérica

Lesson Purpose

The purpose of this lesson is for students to extend their understanding of whole numbers on the number line as they work with number lines partitioned into fractions.

Lesson Narrative

Previously, students used fraction strips to make sense of unit and non-unit fractions. In grade 2, they represented whole numbers on the number line. In this lesson, students learn that quantities that are not whole numbers can also be represented on the number line, an important step toward the understanding that fractions are numbers. To support this transition, students move from representing fractions by shading diagrams (an area representation) to marking their locations on a number line (a linear representation).

  • Representation
  • MLR2

Learning Goals

Teacher Facing

  • Extend understanding of whole numbers on the number line to see fractions on a number line.

Student Facing

  • Aprendamos sobre fracciones en la recta numérica.

Required Materials

Materials to Gather

Materials to Copy

  • Fold and Label Number Lines
  • Card Sort: Number Lines

Required Preparation

Activity 1:

  • Create a set of cards from the blackline master for each group of 2. 

Activity 2:

  • Each student needs at least 5 number lines from 0 to 1. Each copy of the blackline master contains a few extra number lines, in case students fold incorrectly at first.
  • Create a number line folded into fourths and a fraction strip that shows fourths to display in the synthesis.

CCSS Standards


Lesson Timeline

Warm-up 10 min
Activity 1 10 min
Activity 2 25 min
Lesson Synthesis 10 min
Cool-down 5 min

Teacher Reflection Questions

What was the best question you asked students today? Why would you consider it the best one based on what students said or did?

Suggested Centers

  • Mystery Number (1–4), Stage 3: Fractions with Denominators 2, 3, 4, 6 (Addressing)
  • Number Line Scoot (2–3), Stage 2: Halves, Thirds and Fourths (Addressing)

Print Formatted Materials

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Student Task Statements pdf docx
Lesson Cover Page pdf docx
Cool Down Log In
Teacher Guide Log In
Teacher Presentation Materials pdf docx
Blackline Masters zip