Lesson 6

Find Area

Est. Class Sessions: 2
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Mathematical Standards

2.G.A
Reason with shapes and their attributes. (2.G.A.1, 2.G.A.2, 2.G.A.3)

Standards for Mathematical Practice

MP1.
Make sense of problems and persevere in solving them.
MP2.
Reason quantitatively.
MP4.
Model with mathematics.
MP5.
Use appropriate tools strategically.
MP6.
Attend to precision.
MP7.
Look for and make use of structure.
MP8.
Look for and express regularity in repeated reasoning.

Students review how to choose an appropriate unit of measure, use it, and report area measurement using both a number and a unit. They find the areas of shapes, including those containing half and fourth square centimeters, on a centimeter grid using counting, repeated addition, and reasoning strategies.

Content in this Lesson

  • Finding the area of a shape on a grid using counting, repeated addition, and reasoning strategies [E8].
  • Composing and decomposing shapes into smaller shapes [E6].
  • Adding half and fourth square centimeters to find area.
  • Using words and models to describe equal shares (e.g., half, half of) [E4].
  • Using numbers, words, and square units to report area measurements [MPE6].
  • Finding area a second way to check the reasonableness of an answer [MPE3].
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Materials for Students

Daily Practice and Problems Lesson Homework Assessment

Student Books

 Student Activity Book

Teacher Resources

 Teacher Guide - digital

Supplies for Students

centimeter/inch ruler

Materials for the Teacher

Display of Measure Shapes (Teacher Guide)
Display of first two pages of Find Area on a Grid (Student Activity Book) Pages 673–674
Display of Shapes on Grids (Student Activity Book) Pages 677–681
Unit 6 Assessment Record
centimeter ruler
several different non-standard units: small paper clips, large paper clips, chalk, pennies, square-inch tiles

Materials Preparation

Prepare Optional Targeted Practice. Make copies of the You Make the Shape Assessment Masters for targeted practice.

Assessment in this Lesson

Assessment Expectation Assessed Math Practices Expectation Assessed
Find Area on a Grid
Check-In: Question #5
with Feedback Box
Student Activity Book
Pages 675–676
E6. 
Compose and decompose shapes into smaller shapes.
E8. 
Find the area of a shape on a grid using counting, repeated addition, and reasoning strategies.
MPE5. 
Show my work. I show or tell how I arrived at my answer so someone else can understand my thinking.
MPE6. 
Use labels. I use labels to show what numbers mean.
Shapes on Grids
Check-In: Question #14
Student Activity Book
Page 681
E6. 
Compose and decompose shapes into smaller shapes.
E8. 
Find the area of a shape on a grid using counting, repeated addition, and reasoning strategies.
MPE6. 
Use labels. I use labels to show what numbers mean.