Table for 22: A RealWorld Geometry Project
Common Core State Standards
Math 
Math 
3 
Grade 3 
MD 
Measurement & Data 
C 
Geometric measurement: understand concepts of area and relate area to multiplication and to addition 
7b 
Relate area to the operations of multiplication and addition. a. Find the area of a rectangle with wholenumber side lengths by tiling it, and show that the area is the same as would be found by multiplying the side lengths. b. Multiply side lengths to find areas of rectangles with wholenumber side lengths in the context of solving real world and mathematical problems, and represent wholenumber products as rectangular areas in mathematical reasoning. c. Use tiling to show in a concrete case that the area of a rectangle with wholenumber side lengths a and b + c is the sum of a × b and a × c. Use area models to represent the distributive property in mathematical reasoning. d. Recognize area as additive. Find areas of rectilinear figures by decomposing them into nonoverlapping rectangles and adding the areas of the nonoverlapping parts, applying this technique to solve real world problems. 
Download Common Core State Standards (PDF 1.2 MB) 
Common Core State Standards
Math 
Math 
3 
Grade 3 
MD 
Measurement & Data 
D 
Geometric measurement: recognize perimeter 
8 
Solve real world and mathematical problems involving perimeters of polygons, including finding the perimeter given the side lengths, finding an unknown side length, and exhibiting rectangles with the same perimeter and different areas or with the same area and different perimeters. 
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
 45
 23

Lesson Idea  Common CoreSubtraction as a Confidence BuilderGrades 35 / Math / Multiple MethodsMath.3.NBT.A.2
 160
 3

Lesson Idea (Common Core)Reasoning About Multiplication & DivisionGrades 35 / Math / StrategiesMath.3.OA.B.5
 1K
 53

Lesson Idea  Common CorePreparation for Fraction MultiplicationGrades 35 / Math / ScaffoldingMath.5.NF.B.4 / Math.5.NF.B.6
 178
 13

Lesson Idea (Common Core)Multiplying Whole Numbers & FractionsGrades 35 / Math / ReasoningMath.4.NF.B.4b / Math.Practice.MP2 / Math.Practice.MP3
 225
 35

Lesson Idea (Common Core)Reasoning About DivisionGrades 35 / Math / StrategiesMath.4.NBT.B.6
 951
 95

Planning/CollaborationReflecting on Teaching & Learning About FractionsGrades 35 / Math / Teacher CollaborationMath.5.NF.B.4 / Math.5.NF.B.6
 111
 2

Lesson Idea  Common CoreUnderstanding Fractions through RealWorld TasksGrade 3 / Math / ModelingMath.3.NF.A.1 / Math.3.NF.A.2a / Math.Practice.MP4
 53
 10
 Lesson Objective
 Apply knowledge of area and perimeter to solve realworld problems
 Length
 14 min
 Questions to Consider
 Why does Ms. Park go back to 3rd grade content standards? How does she ramp up to teaching 6th grade content?When Ms. Park says that you create your practice by knowing the content first, what does this mean?How does Ms. Park ask students to reflect on their learning? Why is this reflection important?
Teacher & School Info
 School Details
 Eastside College Preparatory School East Palo Alto, CA
 Population
 326 students
Supporting Materials

A Closer Look at Perimeter and Area Lesson Plan

Perfect Square Extension Activity Sheet

Area Perimeter Activity Sheet

Extension Activity Sheet

Table for 22 Transcript