Lesson 5

Fraction Puzzles

Est. Class Sessions: 1
X

Mathematical Standards

2.G.A
Reason with shapes and their attributes. (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.
MP5.
Use appropriate tools strategically.
MP6.
Attend to precision.
MP7.
Look for and make use of structure.

Students informally experience adding one-half and one-fourth as they complete fraction puzzles where different representations of the two fractions are shown. They piece together both triangular and rectangular halves and discover that differently shaped halves still cover the same area.

Content in this Lesson

  • Recognizing that equal shares of the same whole do not have to be the same shape but they must have equal areas [E5].
  • Exploring addition of fractions.
  • Using words and models to describe equal shares (e.g., half, half of, one-fourth) [E4].
  • Finding a strategy to solve puzzles [MPE2].
  • Showing or telling how puzzles were solved [MPE5].

Daily Practice and Problems O–P

O. Addition and Subtraction with Tens

P. Time

X

Materials for Students

Daily Practice and Problems Lesson Homework Assessment

Student Books

 Student Activity Book

Teacher Resources

 Teacher Guide - digital

Supplies for Students

scissors
gluesticks
centimeter/inch ruler

Materials for the Teacher

Display of One-Half Plus One-Fourth 1 (Student Activity Book) Page 665
copy of One-Half Plus One-Fourth 1 (Student Activity Book) Page 665
Display of Puzzling Out Halves (Student Activity Book) Page 669
copy of Puzzling Out Halves (Student Activity Book) Page 669
Unit 13 Assessment Record

Assessment in this Lesson

Assessment Expectation Assessed Math Practices Expectation Assessed
Puzzle Proof
with Feedback Box
Student Activity Book
Pages 671–672
E4. 
Use words and models to describe equal shares (e.g., half, half of).
E5. 
Recognize that equal shares of the same whole do not have to be the same shape.
MPE2. 
Find a strategy. I choose good tools and an efficient strategy for solving the problem.
MPE5. 
Show my work. I show or tell how I arrived at my answer so someone else can understand my thinking.

Vocabulary in this Lesson