What Fraction of this Shape is Red?
Common Core State Standards
Math 
Math 
3 
Grade 3 
G 
Geometry 
A 
Reason with shapes and their attributes 
2 
Partition shapes into parts with equal areas. Express the area of each part as a unit fraction of the whole. For example, partition a shape into 4 parts with equal area, and describe the area of each part as 1/4 of the area of the shape. 
Download Common Core State Standards (PDF 1.2 MB) 
Common Core State Standards
Math 
Math 
3 
Grade 3 
NF 
Numbers & OperationsFractions 
A 
Develop understanding of fractions as numbers 
1 
Understand a fraction 1/b as the quantity formed by 1 part when a whole is partitioned into b equal parts; understand a fraction a/b as the quantity formed by a parts of size 1/b. Grade 3 expectations in this domain are limited to fractions with denominators 2, 3, 4, 6, 8. 
Download Common Core State Standards (PDF 1.2 MB) 
Common Core State Standards
Math 
Math 
3 
3rd Grade 
NF 
Number and Operationsâ€“Fractions 
1 
Understand a fraction 1/b as the quantity formed by 1 part when a whole is partitioned into b equal parts; understand a fraction a/b as the quantity formed by a parts of size 1/b. 
Download Common Core State Standards (PDF 1.2 MB) 

Teaching PracticeFormative Assessment: Understanding FractionsGrades 34 / Math / FractionsMath.3.NF.A.1 / Math.Practice.MP1 / Math.Practice.MP2
 32
 17

Lesson Idea  Common CoreUnderstanding Fractions through RealWorld TasksGrade 3 / Math / ModelingMath.3.NF.A.1 / Math.3.NF.A.2a / Math.Practice.MP4
 10
 3

Lesson Idea  Common CorePreparation for Fraction MultiplicationGrades 35 / Math / ScaffoldingMath.5.NF.B.4 / Math.5.NF.B.6
 144
 11

Lesson Idea (Common Core)Multiplying Whole Numbers & FractionsGrades 35 / Math / ReasoningMath.4.NF.B.4b / Math.Practice.MP2 / Math.Practice.MP3
 222
 33

Lesson IdeaLaunching a Fractions TaskGrade 4 / Math / ModelingMath.4.NF.B.3a / Math.4.NF.B.3c
 60
 3

Lesson Idea (Common Core)Fractions with BorrowingGrade 4 / Math / FractionsMath.5.NF.A.1
 73
 25

Lesson Idea (Common Core)A Passion for FractionsGrades 35 / Math / ReasoningMath.5.NF.B.4b / Math.Practice.MP2 / Math.Practice.MP3
 502
 59

Planning/CollaborationReflecting on Teaching & Learning About FractionsGrades 35 / Math / Teacher CollaborationMath.5.NF.B.4 / Math.5.NF.B.6
 105
 Lesson Objective
 Students explore part and whole by creating pattern block designs
 Length
 5 min
 Questions to Consider
 How does using pattern blocks of multiple shapes push students thinking about partitioning into equal parts?
 Why does Mr. D have students explain their work geometrically, verbally, and in writing?
 How could Mr. D extend this lesson to develop students thinking around adding and subtracting fractions or decomposition of fractions?
 Support Materials Below
 Transcript
 Common Core Standards
 Math.3.G.A.2, Math.3.NF.A.1, Math.3.NF.1
Teacher & School Info
 School Details
 San Carlos Charter Learning Center San Carlos, CA
 Population
 309 students
 District Spending
 $10,284
Supporting Materials

Transcript for What Fraction of this Shape is Red?

Fractions
Inside Mathematics Website
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Lesson Idea (Common Core) What Fraction of this Shape is Red?
Grades 56 / Math / Fractions