Lesson 17
Más problemas sobre perímetros
Lesson Purpose
The purpose of this lesson is for students to solve geometric problems using their understanding of length measurements, unit conversion, multiplicative comparison, and addition or subtraction of fractions.
Lesson Narrative
In a previous lesson, students were reminded about the relationship between the side lengths and the perimeter of a rectangle and reasoned multiplicatively to solve problems about those measurements. In this lesson, they continue to do so but in contexts that require them to convert the units and interpret them. Students also consider the perimeter of other quadrilaterals.
- Representation
- MLR7
Learning Goals
Teacher Facing
- Solve problems involving perimeter using multiplicative comparison and addition or subtraction of fractions (including mixed numbers)
Student Facing
- Resolvamos problemas sobre el perímetro de varias figuras.
Required Materials
Materials to Copy
- Missing Measurements - Large, Spanish
- Missing Measurements - Small, Spanish
Required Preparation
Activity 2:
- If the activity is done as a gallery walk, print and cut 1–2 copies of the blackline master with the larger images and post them around the classroom. Otherwise, print and cut 1 copy of the blackline master with the smaller images for each group of 3–4 students.
CCSS Standards
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
As students shared their ideas today, how did you ensure all students’ voices were heard? In what ways did you show that all voices are valued and important for collective learning?
Suggested Centers
- Can You Draw It? (1–5), Stage 4: Area and Perimeter (Supporting)
- Rectangle Rumble (3–5), Stage 3: Factors 1–10 (Supporting)
Print Formatted Materials
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Student Task Statements | docx | |
Lesson Cover Page | docx | |
Cool Down | Log In | |
Teacher Guide | Log In | |
Teacher Presentation Materials | docx | |
Blackline Masters | zip |