Канал: Becki Haar

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3rd Grade Math Lesson 1-7 Scales Bar Graphs

3rd Grade Math Lesson 1-7 Scales Bar Graphs

3rd Grade Math Lesson Time

3rd Grade Math Lesson Time

3rd Grade Math Lesson 1-3 Tools for Mathematics

3rd Grade Math Lesson 1-3 Tools for Mathematics

3rd Grade Math Lesson 1-3 Tools for Mathematics

3rd Grade Math Lesson 1-3 Tools for Mathematics

3rd Grade Math Number Lines and Rounding

3rd Grade Math Number Lines and Rounding

3rd Grade Math Lesson 1-2 Introducing the Student Reference Book

3rd Grade Math Lesson 1-2 Introducing the Student Reference Book

3rd Grade Math 1-1 Number Grids

3rd Grade Math 1-1 Number Grids

5th Grade Math Lesson 1-6 More Area of Rectangles

5th Grade Math Lesson 1-6 More Area of Rectangles

5th Grade Math Lesson 7-6 part 1 A Hierarchy of Quadrilaterals

5th Grade Math Lesson 7-6 part 1 A Hierarchy of Quadrilaterals

5th Grade Math Lesson 7-5 A Hierarchy of Triangles

5th Grade Math Lesson 7-5 A Hierarchy of Triangles

4th Grade Math Lesson 7-12 Decimal Number Stories

4th Grade Math Lesson 7-12 Decimal Number Stories

4th Grade Math Lesson 7-11 Weights of State Birds

4th Grade Math Lesson 7-11 Weights of State Birds

4th Grade Math Lesson 7-10 Solving Multistep Fraction Number Stories

4th Grade Math Lesson 7-10 Solving Multistep Fraction Number Stories

5th Grade Math Lesson 7-4 Part 2 Fraction Decimal Problems

5th Grade Math Lesson 7-4 Part 2 Fraction Decimal Problems

5th Grade Math Lesson 7-4 Part 1 Using Common Denominators to Divide

5th Grade Math Lesson 7-4 Part 1 Using Common Denominators to Divide

4th Grade Math Lesson 7-9 Part 2 Identifying Figurate Number Patterns

4th Grade Math Lesson 7-9 Part 2 Identifying Figurate Number Patterns

4th Grade Math Lesson 7-9 Part 1 Plotting and Analyzing Swim Data

4th Grade Math Lesson 7-9 Part 1 Plotting and Analyzing Swim Data

4th Grade Math Lesson 7-8 Part 2 Solving Division Measurement Stories

4th Grade Math Lesson 7-8 Part 2 Solving Division Measurement Stories

5th Grade Math Lesson 7-3 Area Problems

5th Grade Math Lesson 7-3 Area Problems

5th Grade Math Lesson 7-2 Part 2 Solving Mixed-Number Multiplication Problems

5th Grade Math Lesson 7-2 Part 2 Solving Mixed-Number Multiplication Problems

4th Grade Math Lesson 7-8 Part 1 Solving Division Measurement Stories

4th Grade Math Lesson 7-8 Part 1 Solving Division Measurement Stories

4th Grade Math Lesson 7-7 Part 2 Multi-Step Division Number Stories

4th Grade Math Lesson 7-7 Part 2 Multi-Step Division Number Stories

4th Grade Math Lesson 7-7 Multistep Number Division Stories

4th Grade Math Lesson 7-7 Multistep Number Division Stories

5th Grade Math Lesson 7-2 Part 1- Renaming Mixed Numbers and Fractions

5th Grade Math Lesson 7-2 Part 1- Renaming Mixed Numbers and Fractions

5th Grade Math Lesson 7-1 Multiplying Mixed Numbers

5th Grade Math Lesson 7-1 Multiplying Mixed Numbers

MCA Practice 3:28 Bread to Make Dumplings

MCA Practice 3:28 Bread to Make Dumplings

Umbrella Craft-3/23/22

Umbrella Craft-3/23/22

5th Grade Math Lesson 6-13 Application: Estimating Your Reaction Time

5th Grade Math Lesson 6-13 Application: Estimating Your Reaction Time

5th Grade Math Lesson 6-12 Division of Decimals by Decimals

5th Grade Math Lesson 6-12 Division of Decimals by Decimals

5th Grade Math Lesson 6-11 Division of Decimals by Whole Numbers

5th Grade Math Lesson 6-11 Division of Decimals by Whole Numbers

5th Grade Math Lesson Review (use after lesson 6-10)

5th Grade Math Lesson Review (use after lesson 6-10)

5th Grade Math Lesson 6-9 Multiplication of Decimals

5th Grade Math Lesson 6-9 Multiplication of Decimals

5th Grade Math Lesson 6-5a Review With Math Boxes

5th Grade Math Lesson 6-5a Review With Math Boxes

5th Grade Math Lesson 6-8 Estimating Decimal Products and Quotients

5th Grade Math Lesson 6-8 Estimating Decimal Products and Quotients

5th Grade Math Lesson 6-7 Measuring Volume by Displacement

5th Grade Math Lesson 6-7 Measuring Volume by Displacement

5th Grade Math Lesson 6-5 Working with Data in Line Plots

5th Grade Math Lesson 6-5 Working with Data in Line Plots

5th Grade Math Lesson 6-4 Day 2 Line Plots

5th Grade Math Lesson 6-4 Day 2 Line Plots

5th Grade Math Lesson 6-4 Line Plots

5th Grade Math Lesson 6-4 Line Plots

5th Grade Math Lesson 6-3 Application: Converting Measurements in the Metric System

5th Grade Math Lesson 6-3 Application: Converting Measurements in the Metric System

5th Grade Math Lesson 6-2 Playing Exponent Ball

5th Grade Math Lesson 6-2 Playing Exponent Ball

5th Grade Math Lesson 6-1 Multiplying and Dividing by Powers of 10

5th Grade Math Lesson 6-1 Multiplying and Dividing by Powers of 10

5th Grade Math Lesson 5-4 Subtracting Fractions and Mixed Numbers

5th Grade Math Lesson 5-4 Subtracting Fractions and Mixed Numbers

5th Grade Math Lesson 5-14 Part 2Fraction Division Problems

5th Grade Math Lesson 5-14 Part 2Fraction Division Problems

5th Grade Math Lesson 5-13 Fraction Division Part 1

5th Grade Math Lesson 5-13 Fraction Division Part 1

5th Grade Math Lesson 5-12 Fraction Multiplication Number Stories

5th Grade Math Lesson 5-12 Fraction Multiplication Number Stories

5th Grade Math Lesson 5-11 Explaining the Equivalent Fractions Rule

5th Grade Math Lesson 5-11 Explaining the Equivalent Fractions Rule

5th Grade Math Lesson 5-9 Understanding an Algorithm for Fraction Multiplication

5th Grade Math Lesson 5-9 Understanding an Algorithm for Fraction Multiplication

5th Grade Math Lesson 5-8 Area Models for Fraction Multiplication

5th Grade Math Lesson 5-8 Area Models for Fraction Multiplication

5th Grade Math Lesson 5-7 Fractions of Fractions

5th Grade Math Lesson 5-7 Fractions of Fractions

5th Grade Math Lesson 5-6 Multiplication of Fractions and Whole Numbers

5th Grade Math Lesson 5-6 Multiplication of Fractions and Whole Numbers

5th Grade Math Lesson 5-5 Connecting Fraction-Of Problems to Multiplication

5th Grade Math Lesson 5-5 Connecting Fraction-Of Problems to Multiplication

5th Grade Math Lesson5-4 Subtraction of Fractions and Mixed Numbers

5th Grade Math Lesson5-4 Subtraction of Fractions and Mixed Numbers

5th Grade Math Lesson 5-3 Addition of Fractions and Mixed Numbers

5th Grade Math Lesson 5-3 Addition of Fractions and Mixed Numbers

5th Grade Math Lesson 5-2 More Strategies for Finding Common Denominators

5th Grade Math Lesson 5-2 More Strategies for Finding Common Denominators

5th Grade Math Lesson 4-14 Adding and Subtracting of Money

5th Grade Math Lesson 4-14 Adding and Subtracting of Money

5th Grade Math Lesson 4-13 Using Algorithms to Subtract Decimals

5th Grade Math Lesson 4-13 Using Algorithms to Subtract Decimals

Math Lesson 4-10 Multiplication Wrestling

Math Lesson 4-10 Multiplication Wrestling

5th Grade Math Lesson 4-9 Solving Problems on a Coordinate Grid Part 2

5th Grade Math Lesson 4-9 Solving Problems on a Coordinate Grid Part 2

5th Grade Math Lesson 4-7 Playing Hidden Treasure

5th Grade Math Lesson 4-7 Playing Hidden Treasure

5th Grade Math Lesson 4-11 Addition and Subtraction of Decimals with Hundredths Grids

5th Grade Math Lesson 4-11 Addition and Subtraction of Decimals with Hundredths Grids

5th Grade Math Lesson 4-9 Solving Problems on a Coordinate Grid Part 2

5th Grade Math Lesson 4-9 Solving Problems on a Coordinate Grid Part 2

5th Grade Math Lesson 4-12 Decimal Addition Algorithms

5th Grade Math Lesson 4-12 Decimal Addition Algorithms

5th Grade Math Lesson 4 -1 Addition and Subtraction of Decimals with Hundredths Grids

5th Grade Math Lesson 4 -1 Addition and Subtraction of Decimals with Hundredths Grids

5th Grade Math Lesson 4-8 Solving Problems on a Coordinate Grid Part 1

5th Grade Math Lesson 4-8 Solving Problems on a Coordinate Grid Part 1

5th Grade Math Lesson 4-6 Introduction to the Coordinate System

5th Grade Math Lesson 4-6 Introduction to the Coordinate System

5th Grade Math Lesson 4-5 Rounding Decimals

5th Grade Math Lesson 4-5 Rounding Decimals

5th Grade Math Lesson 4-4 Comparing and Ordering Decimals

5th Grade Math Lesson 4-4 Comparing and Ordering Decimals

5th Grade Math Lesson 4-1 Decimal Place Value

5th Grade Math Lesson 4-1 Decimal Place Value

5th Grade Math Lesson 4-1 Decimal Place Value

5th Grade Math Lesson 4-1 Decimal Place Value

5th Grade Math Lesson 4-3 Representing Decimals in Expanded Form

5th Grade Math Lesson 4-3 Representing Decimals in Expanded Form

5th Grade Math Lesson 4-2 Representing Decimals through Thousandths

5th Grade Math Lesson 4-2 Representing Decimals through Thousandths

5th Grade Math Lesson 3-11 Playing Fraction Capture

5th Grade Math Lesson 3-11 Playing Fraction Capture

5th Grade Math Lesson 3-14 Fraction-Of Problems Part 2

5th Grade Math Lesson 3-14 Fraction-Of Problems Part 2

5th Grade Math Lesson 3-13 Fraction-Of Problems Part 1

5th Grade Math Lesson 3-13 Fraction-Of Problems Part 1

5th Grade Math Lesson 3-12 Solving Fraction Number Stories

5th Grade Math Lesson 3-12 Solving Fraction Number Stories

Christmas Haar video

Christmas Haar video

Christmas Dance

Christmas Dance

5th Grade Math Lesson 3-10 Exploring Addition of Fractions with Unlike Denominators

5th Grade Math Lesson 3-10 Exploring Addition of Fractions with Unlike Denominators

5th Grade Math Lesson 3-8 Renaming Fractions and Mixed Numbers

5th Grade Math Lesson 3-8 Renaming Fractions and Mixed Numbers

5th Grade Math Lesson 3-6 Fraction Estimation with Number Sense

5th Grade Math Lesson 3-6 Fraction Estimation with Number Sense

5th Grade Math Lesson 3-9 Intro To Adding and Subtracting Fractions and Mixed Numbers

5th Grade Math Lesson 3-9 Intro To Adding and Subtracting Fractions and Mixed Numbers

5th Grade Math Lesson 3-7 Fraction Estimation with Benchmarks

5th Grade Math Lesson 3-7 Fraction Estimation with Benchmarks

5th Grade Math Lesson 3-4 Fractions on a Number Line

5th Grade Math Lesson 3-4 Fractions on a Number Line

5th Grade Math Lesson 3-3 Application: Interpreting Remainders

5th Grade Math Lesson 3-3 Application: Interpreting Remainders

5th Grade Math Lesson 3-2 Connecting Fractions and Division Part 2

5th Grade Math Lesson 3-2 Connecting Fractions and Division Part 2

5th Grade Math Lesson 3-1 Connecting Fractions and Division

5th Grade Math Lesson 3-1 Connecting Fractions and Division

5th Grade Math Lesson 1-4c Comparing Surface Areas

5th Grade Math Lesson 1-4c Comparing Surface Areas

5th Grade Math Lesson 1-4b Drawing Nets for 3-Dimensional Shapes

5th Grade Math Lesson 1-4b Drawing Nets for 3-Dimensional Shapes

5th Grade Math Lesson 1-4a Describing 3 -Dimensional Shapes

5th Grade Math Lesson 1-4a Describing 3 -Dimensional Shapes

5th Grade Math Lesson 2-12 Strategies for Choosing Partial Quotients

5th Grade Math Lesson 2-12 Strategies for Choosing Partial Quotients

5th Grade Math Less 2-11 Reviewing Partial Quotient Division

5th Grade Math Less 2-11 Reviewing Partial Quotient Division

5th Grade Math Lesson 2-13 Interpreting the Remainder

5th Grade Math Lesson 2-13 Interpreting the Remainder

5th Grade Math Lesson 2-10 A Mental Division Strategy

5th Grade Math Lesson 2-10 A Mental Division Strategy

5th GradeMath Lesson 2-8 U.S. Traditional Multiplication Part 4

5th GradeMath Lesson 2-8 U.S. Traditional Multiplication Part 4

5th Grade Math Lesson 2-7 U.S. Traditional Multiplication Part 3

5th Grade Math Lesson 2-7 U.S. Traditional Multiplication Part 3

5th Grade Math Lesson 2-6 Application: Unit Conversions

5th Grade Math Lesson 2-6 Application: Unit Conversions

5th Grade Math Lesson 2-5 U.S. Traditional Multiplication Part 2

5th Grade Math Lesson 2-5 U.S. Traditional Multiplication Part 2

5th Grade Lesson 2-3 Applying Powers of 10

5th Grade Lesson 2-3 Applying Powers of 10

5th Grade Math Lesson Exponents and Powers of 10

5th Grade Math Lesson Exponents and Powers of 10

5th Grade Math Lesson 2-4 U.S. Traditional Multiplication Part 1

5th Grade Math Lesson 2-4 U.S. Traditional Multiplication Part 1

5th Grade Math Lesson 2-1 Understanding Place Value

5th Grade Math Lesson 2-1 Understanding Place Value

Prism Pile Up

Prism Pile Up

5th Grade Prism Pile Up Game

5th Grade Prism Pile Up Game

5th Grade Math Lesson 1-10 Visualizing Volume Units

5th Grade Math Lesson 1-10 Visualizing Volume Units

5th Grade Math Lesson 1-11 Volume Explorations

5th Grade Math Lesson 1-11 Volume Explorations

5th Grade Math Lesson 1-8 and 1-9 Review

5th Grade Math Lesson 1-8 and 1-9 Review

5th Grade Math Lesson 1-9 Two Formulas for Volume

5th Grade Math Lesson 1-9 Two Formulas for Volume

5th Grade Math Lesson 1-8 Measuring Volume by Iterating Layers

5th Grade Math Lesson 1-8 Measuring Volume by Iterating Layers

5th Grade Math Lesson 1-7 Measuring Volume by Counting Cubes

5th Grade Math Lesson 1-7 Measuring Volume by Counting Cubes

Recording #2

Recording #2

Math Lesson 7-5 Multiplying Mixed Numbers by Whole Numbers

Math Lesson 7-5 Multiplying Mixed Numbers by Whole Numbers

Wednesday's Morning Message

Wednesday's Morning Message

Math Lesson 7-4 Multiplying Fractions by Whole Numbers

Math Lesson 7-4 Multiplying Fractions by Whole Numbers

Math Lesson 7-1 Part 2 Converting Liquid Measures: U.S. Customary Units

Math Lesson 7-1 Part 2 Converting Liquid Measures: U.S. Customary Units

Math Lesson 7-3 A Fraction as a Multiple of a Unit Fraction

Math Lesson 7-3 A Fraction as a Multiple of a Unit Fraction

Math Lesson 3-5 Veggie Pizzas (Open Response)

Math Lesson 3-5 Veggie Pizzas (Open Response)

Lesson 7-1 Converting Liquid Measures: U.S. Customary Units

Lesson 7-1 Converting Liquid Measures: U.S. Customary Units

Math Lesson 7-2 Exploring Fraction Multiplication Situations

Math Lesson 7-2 Exploring Fraction Multiplication Situations

Morning Meeting-Tuesday

Morning Meeting-Tuesday

Morning Meeting May 10, 2021

Morning Meeting May 10, 2021

Math Lesson 6-13 Whole Number Multiplication (Fractions)

Math Lesson 6-13 Whole Number Multiplication (Fractions)

Tables and Graphs (Lesson 6-4 and Lesson 6-8a)

Tables and Graphs (Lesson 6-4 and Lesson 6-8a)

Math Lesson 6-12 Number Stories With Fractions and Mixed Numbers

Math Lesson 6-12 Number Stories With Fractions and Mixed Numbers

Circle Design #1

Circle Design #1

Circle Design #3

Circle Design #3

Circle Design #2

Circle Design #2

IMG 5824

Angle Tangle Game Directions

Angle Tangle Game Directions

Traditional Long Division-Day 2

Traditional Long Division-Day 2

Traditional Long Division Unit 6

Traditional Long Division Unit 6

Math Lesson 6-11 Angle Measure as Additive

Math Lesson 6-11 Angle Measure as Additive

Math Lesson 6-10 Using a Half Circle Protractor

Math Lesson 6-10 Using a Half Circle Protractor

Math Lesson 6-9 Measuring Angles

Math Lesson 6-9 Measuring Angles

Math Lesson 6-8a Two Digit Divisors

Math Lesson 6-8a Two Digit Divisors

Math Lesson 6-8 Expressing and Interpreting Remainders

Math Lesson 6-8 Expressing and Interpreting Remainders

Math Lesson 6-7 Partial Quotient Part 2

Math Lesson 6-7 Partial Quotient Part 2

Math Lesson 6-6 Customary Units of Weight

Math Lesson 6-6 Customary Units of Weight

Math Lesson 4-13a US Traditional Multiplication 2 Digit X 2 Digit

Math Lesson 4-13a US Traditional Multiplication 2 Digit X 2 Digit

Math Lesson 6-4 Partial Quotients Division Part 1

Math Lesson 6-4 Partial Quotients Division Part 1

Math Lesson 6-3 Strategies for Division

Math Lesson 6-3 Strategies for Division

Build It (Connect Ed game)

Build It (Connect Ed game)

Math Lesson 6-2 Area: Finding Missing Side Lengths

Math Lesson 6-2 Area: Finding Missing Side Lengths

Math Lesson 6-1 Extended Division Facts

Math Lesson 6-1 Extended Division Facts

Clips Cartoon Directions

Clips Cartoon Directions

Math Lesson 5-13a More Comparing and Ordering Fractions

Math Lesson 5-13a More Comparing and Ordering Fractions

Math Lesson 5-12 Creating Symmetric Figures

Math Lesson 5-12 Creating Symmetric Figures

Math Lesson 5-6a Venn Diagrams

Math Lesson 5-6a Venn Diagrams

Math Lesson 5-11 Unit Iteration for Angles

Math Lesson 5-11 Unit Iteration for Angles

Math Lesson 5-10 Rotations and Iterating Angles

Math Lesson 5-10 Rotations and Iterating Angles

Math Lesson 5-8 Subtracting Mixed Numbers

Math Lesson 5-8 Subtracting Mixed Numbers

Math Lesson 5-9 Line Plots

Math Lesson 5-9 Line Plots

Math Lesson 5-12 Creating Symmetric Figures

Math Lesson 5-12 Creating Symmetric Figures

Math Lesson 5-11 Unit Iteration for Angles

Math Lesson 5-11 Unit Iteration for Angles

Math Lesson 5-7 Subtracting Fractions

Math Lesson 5-7 Subtracting Fractions

Math Lesson 5-5 Adding Tenths and Hundredths

Math Lesson 5-5 Adding Tenths and Hundredths

Math Lesson 5-4 Adding Mixed Numbers

Math Lesson 5-4 Adding Mixed Numbers

Math Lesson 5-3 Adding Fractions

Math Lesson 5-3 Adding Fractions

Math Lesson 5-1 Fraction Decomposition

Math Lesson 5-1 Fraction Decomposition

Multiplication Top It Directions

Multiplication Top It Directions

Directions for Playing Multiplication Wrestling

Directions for Playing Multiplication Wrestling

Math Lesson 4-13a Traditional Multiplication by a Single Digit

Math Lesson 4-13a Traditional Multiplication by a Single Digit

Math Lesson 4-13 Lattice Multiplication

Math Lesson 4-13 Lattice Multiplication

Math Lesson 4-12 Solving Multistep Multiplication Number Stories

Math Lesson 4-12 Solving Multistep Multiplication Number Stories

Math Lesson 4-11 Finding Area of Figures

Math Lesson 4-11 Finding Area of Figures

Math Lesson 4-9 Multiplying 2 Digit by 2 Dgit

Math Lesson 4-9 Multiplying 2 Digit by 2 Dgit

Build It Game Instructions

Build It Game Instructions

Math Lesson 4-7 Metric Mass Measurements

Math Lesson 4-7 Metric Mass Measurements

Math Lesson 4-6 Partial Products Multiplication

Math Lesson 4-6 Partial Products Multiplication

Math Lesson 4-4 Measuring Liquids in Metric Units

Math Lesson 4-4 Measuring Liquids in Metric Units

Math Lesson 4-3 Partitioning Rectangles

Math Lesson 4-3 Partitioning Rectangles

Math Lesson 4-2 Making Reasonable Estimates for Products

Math Lesson 4-2 Making Reasonable Estimates for Products

Math Lesson 4-1 Extending Multiplication Facts

Math Lesson 4-1 Extending Multiplication Facts

Decimal Top It (to hundredths)

Decimal Top It (to hundredths)

Math Lesson 3-13b Rounding Decimals

Math Lesson 3-13b Rounding Decimals

Math Lesson 3-12 Tenths of a Centimeter

Math Lesson 3-12 Tenths of a Centimeter

Math Lesson 3-11 Tenths and Hundredths of a Meter

Math Lesson 3-11 Tenths and Hundredths of a Meter

Math Lesson 3-13 Comparing Decimals

Math Lesson 3-13 Comparing Decimals

Math Lesson 3-12a Thousandths

Math Lesson 3-12a Thousandths

Math Lesson 3-10 Exploring Decimals

Math Lesson 3-10 Exploring Decimals

Using Online Manipulatives/ Add to Homescreen

Using Online Manipulatives/ Add to Homescreen

Math Lesson 3-8 Tenths

Math Lesson 3-8 Tenths

Math Lesson 3-4 Equivalent Fractions

Math Lesson 3-4 Equivalent Fractions

Polygon Capture Game Instructions

Polygon Capture Game Instructions

Math Lesson 3-9 Modeling Decimals with Base-10 Blocks

Math Lesson 3-9 Modeling Decimals with Base-10 Blocks

Math Lesson 3-6 Comparing Fractions

Math Lesson 3-6 Comparing Fractions

Math Lesson 3-7 Comparing and Ordering Fractions

Math Lesson 3-7 Comparing and Ordering Fractions

Math Lesson 3-3 Number Lines and Equivalence

Math Lesson 3-3 Number Lines and Equivalence

Math Lesson 3-2 Part 1 Fraction Circles and Equivalence

Math Lesson 3-2 Part 1 Fraction Circles and Equivalence

Math Lesson 3-2 Part 2 Fraction Circles and Equivalence

Math Lesson 3-2 Part 2 Fraction Circles and Equivalence

Math Lesson 3-1 Sharing Equally

Math Lesson 3-1 Sharing Equally

Geometry Concentration Game Instructions

Geometry Concentration Game Instructions

Math Lesson 2-9a Number Sentences-Part 2

Math Lesson 2-9a Number Sentences-Part 2

NHS Volunteers

NHS Volunteers

Math Lesson 2-9a True or False Number Sentences Numbers Sentences (part 1 of 2)

Math Lesson 2-9a True or False Number Sentences Numbers Sentences (part 1 of 2)

Math Lesson 2-7a Timelines

Math Lesson 2-7a Timelines

Math Lesson 2-13 “What’s My Rule?”

Math Lesson 2-13 “What’s My Rule?”

Math Lesson 2-11 Properties of Quadrilaterals

Math Lesson 2-11 Properties of Quadrilaterals

Math Lesson 2-12 Identifying Lines of Symmetry

Math Lesson 2-12 Identifying Lines of Symmetry