Lesson 2
Representaciones de fracciones (parte 2)
Lesson Purpose
Lesson Narrative
In the previous lesson, students made sense of the meaning of numerator and denominator in unit fractions. They identified fractions represented by diagrams, and partitioned diagrams to represent given fractions. In this lesson, they reason in similar ways—using numerical and visual representations—about non-unit fractions and fractions that are greater than 1.
Students are reminded of what they learned in grade 3: that a non-unit fraction \(\frac{a}{b}\) can be understood as \(a\) parts of a unit fraction \(\frac{1}{b}\), and that fractions with different numerators and denominators can be equivalent. Unlike in grade 3, the denominators they see here now include 5, 10, and 12.
As in the previous lesson, rulers can be provided to help students draw, extend, or align partition lines, but should not be used to measure the location of a fraction on any diagram.
- Representation
- MLR2
Learning Goals
Teacher Facing
- Make sense of the numerator and denominator of unit fractions that have denominators 2, 3, 4, 5, 6, 8, 10, and 12.
- Use diagrams to represent fractions.
Student Facing
- Nombremos otras fracciones y representémoslas con diagramas.
Required Materials
Materials to Gather
Required Preparation
Activity 2:
- Each student needs access to their fraction strips from a previous lesson.
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
Who participated in math class today? What assumptions are you making about those who did not participate? How can you leverage each of your students’ ideas to support them in being seen and heard in tomorrow’s math class?
Suggested Centers
- Get Your Numbers in Order (1–5), Stage 3: Denominators 2, 3, 4, or 6 (Addressing)
- Mystery Number (1–4), Stage 3: Fractions with Denominators 2, 3, 4, 6 (Supporting)