Lessons

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Your search returned these 18 highlighted lessons...

	Barbie Bungee Examining Linear Functions and the Meaning of Slope
	Building A Box Using Nets to Develop Three-Dimensional Visualization Skills
	Competing Coasters Finding the Fastest, Highest, and Longest Roller Coaster
	Constant Dimensions Using Measurement and Algebra to Investigate the Ratio of Length to Width
	Count on Math Developing Number Sense through Estimation and Data Collection
	Eye to Eye Comparing Data Sets and Formulating Questions
	Going Places Measuring and Mapping to Explore Spatial Relationships, Principles of Location, and Navigation
	Ladybug Adventures Learning Geometry and Measurement Concepts
	Let's Count to 10 Identifying, Writing, and Representing Numbers From Zero to Ten
	Polygon Capture Playing a Geometry Game to Learn the Properties of Polygons
	Reflect on This Using a Hinged Mirror to Examine the Interior Angles of Regular Polygons
	Sticks and Stones Investigating Probability With a Native American Game
	The Game of SKUNK Practicing Decision-Making to Better Understand Choice Versus Chance
	To Fret or Not To Fret Exploring the Math Behind the Placement of Frets on Stringed Instruments
	Too Big or Too Small? Developing Number Sense through Large and Small Numbers
	Trout Pond Using Algebra and Discrete Mathematics to Investigate Population Changes
	What Comes Nex_? Looking at Patterns From More Than One Perspective
	Whelk-Come to Mathematics Using Rational Functions to Investigate the Behavior of Northwestern Crows

...as well as these additional 276 lessons...

	A Lunch-In Affair Organizing and Preparing a Luncheon
	A Tale of Two Stories Using The Three Little Pigs and Cinderella to Recognize Similar Characteristics
	Accessing and Investigating Population Data Using Population Pyramids and Creating Graphs of State Population Data
	Adding It All Up Discovering the Polygon Angle Sum Formula through Investigation
	Adjacent Circles A Lesson in Combinations
	Airport Numbers Finding and Using Numbers at the Airport
	Algebraic Transformations Investigating the Commutative and Associative Properties Using Geometric Shapes
	All About Multiplication Exploring the Meanings and Representations of Multiplication
	All in the Family Comparing One Measure of a Square (Side Length, Diagonal Length, Area, or Perimeter) to Another
	Allow Me 2 Reiterate Finding √2 With a Computer Software Program
	Amazing Attributes Sorting and Organizing Buttons and Using Representations to Display Data
	Apple Pi Discovering the Formulas for Circumference and Area
	Archimedes' Puzzle Learning About Symmetry and Transformation with an Ancient Greek Puzzle, the Stomachion
	Area Contractor Measuring Surfaces in a Classroom to Estimate the Cost of Refinishing
	Area Formulas Using (A = l × w) to Discover the Area Formulas for Triangles, Parallelograms, and Trapezoids
	Arithme-Tic-Toc Understanding Modular Arithmetic With Analog Clocks (and Other Real-World Examples)
	Armstrong Numbers Investigating Number Patterns Using Technology
	As People Get Older, They Get Taller Comparing Height and Graphing Change Over Time
	Averages and The Phantom Tollbooth Can It Be?
	Baby Weight Doubling and Halving Numbers
	Bagel Algebra Using Proportional Reasoning For Price Comparisons
	Balancing Act Comparing Weights Using a Pan Balance
	Bar Graph Investigations Using Subtraction to Create and Explore Bar Graphs
	Bean Counting and Ratios Using Sampling to Generate Equivalent Ratios
	Begin With Buttons Exploring Logical And Numerical Relationships
	Birthday Paradox Using a Monte Carlo Simulation Performing Graphical Analysis of the Birthday-Problem Function
	Birthdays and the Binary System Exploring Patterns and Place Value in the Binary System
	Block Pounds Weighing Variables to Determine Their Values
	Body Measurements Finding Length Relationships Between Your Hand, Arm, Neck, Leg, and Other Body Parts
	Bouncing Tennis Balls Discovering Linear Relationships Between Time and Number of Bounces
	Boxing Up Simulating Probability Situations Using Box Models
	Building Bridges Extending Problems from Arithmetic to Algebraic Thinking
	Building Connections Making Connections Among Different Classes of Polynomial Functions
	Building Height Measuring Tall Objects using Triangles and Discussing Measures of Central Tendency
	Building with Triangles An Exploration of the Properties of Triangles
	Buttons! Buttons! Sorting and Classifying Buttons
	Calculating Patterns Representing Patterns with Shapes and Numbers
	Capture - Recapture Using Samples of Beans and Solving Proportions to Find the Population of Birds in a Forest
	Cardiac Output, Rates of Change, and Accumulation Exploring the Measurement of Blood Pumped by the Heart
	Chairs Around The Table Investigating Linear Patterns
	Check That Digit Applying Modular Arithmetic to Barcodes and Credit Cards
	Circle Packing Investigating the Geometry of Packing Circles in Real-World Problems
	Classic Middle-Grades Problems for the Classroom Solving the Mangoes Problem and Sailors and Coconuts in Several Different Ways
	Clowning Around Discovering Combinations
	Code Crackers Exploring Number Concepts through Cryptology
	Collecting The Rays Examining How Area and Volume Affect Energy Absorption of Rectangular Prisms
	Combinations Counting the Possibilities for Ice Cream Cones and Outfits
	Comparing Columns on a Bar Graph Using a Bar Graph to Subtract
	Comparing Connecting Cubes Exploring Five Subtraction Models — Counting, Sets, Number Line, Balanced Equations, and Inverse of Addition
	Corner to Corner Exploring Quadrilaterals, Diagonals, and the Pythagorean Theorem
	Counting Embedded Figures Determining How Many Squares of Any Size are on a Checkerboard
	Counting Embedded Figures Look for Patterns and Forming Generalizations
	Counting the Trains Investigating Patterns That Lead to Functions
	Covering the Plane with Rep‑Tiles Creating Larger, Similar Figures With Tesselations
	Create a House Number Creating Three-Digit Number Combinations
	Creating, Describing, and Analyzing Patterns Investigating Relationships in Growing and Repeating Patterns
	Cubed Cans Exploring Changing from a Cylinder to a Rectangular Prism while Keeping the Volume Constant
	Cubes Everywhere Using Cubes to Develop Spatial Thinking
	Cutting Conics Investigating Conic Sections using a Double-Napped Cone
	Dealing With Data In the Elementary School Analyzing Data About School Lunches Using the Mean, Mode, and Median
	Describe the Graph A Unique Way to Review Plotting Points
	Determining Functions Using Regression Determining an Appropriate Function to Fit Data
	Diagonals to Quadrilaterals Exploring the Relationship Between Diagonals and Quadrilaterals
	Difference of Squares Exploring Arithmetic Sequences, Leading to the Factoring Pattern for the Difference of Squares
	Dirt Bike Dilemma Understanding and Solving Linear Programming Problems
	Distributing and Factoring Using Area Representing Area of a Rectangle Using the Distributive Property
	Dividing a Town into Pizza Delivery Regions Constructing Perpendicular Bisectors and Circumcenters to Explore Delivery Regions
	Do I Have to Mow the Whole Thing? Investigating Inverse Variation
	Do It with Dominoes Exploring Four Addition Models — Counting, Number Line, Sets, and Balanced Equations
	Do You Hear What I Hear? Exploring the Dynamics of Sound Waves
	Domain Representations Describing the Domain of a Function with Graphs, Tables, Number Lines, Words, and Symbols
	Eat Your Veggies Representing Data with Tallies, Pictographs, Bar and Circle Graphs, Line and Box-and-Whisker Plots, and Glyphs
	Egg Launch Contest Students will represent quadratic functions as a table, with a graph, and with words.
	Equations of Attack Relating Linear Equations and Graphs in a Game of Ships and Attacks
	Escape from the Tomb Answering The Question, "When Will I Ever Need To Solve A System Of Equations?"
	Everything Balances Out in the End Building Algebraic Understanding
	Exploration of a Balance Observing Relationships between Mass, Length, and Position of a Fulcrum
	Explorations with Chance Examining Fair and Unfair Games
	Exploring Equations Using Expressions and Equations on the Pan Balance Tool
	Exploring Histograms Using a Data Analysis Tool to Examine Mean, Median, and Standard Deviation
	Exploring Krypto Playing a Numbers Game to Develop Computational Skills and Conceptual Understanding
	Exploring Linear Data Modeling Data From Car Repair Costs and Sports Contexts
	Extending to Symbols Moving from Numeric to Algebraic Notation
	Factor Game Distinguishing Between Numbers With Many Factors and Numbers With Few Factors
	Factor Trail Game Using a Game to Help Students Practice Factoring
	Feeding Frenzy Multiplying Recipes and Converting Measurements to Feed Various Groups
	Fibonacci Nim Using Number Representations to Find the Strategy for Various Nim Games
	Fibonacci Trains Using Cuisenaire Rods to Build Trains, Investigate Patterns, and Make Algebraic Connections
	Figuring In Football Analyzing Graphical Information from Sports
	Finding Our Top Speed Using Hands-On Activity to Develop Understanding of Time and Distance
	Finding Your Way Around Exploring Two-Dimensional Space While Navigating the Coordinate Plane
	Fishing for the Best Prism Students Use Polydrons to Build Nets and Create the Most Appealing Fish Tank
	Five's a Crowd Using Census Data to Explore Population Density
	Food Court Representing and Describing Survey Data in a Variety of Ways
	Food Pyramid Power Using Algebraic Thinking to Discover Properties of Addition
	Football Finances Estimating and the Super Bowl
	Fractional Clothesline Using a Clothesline to Understand Fractions Greater and Less Than One
	Fun with Baseball Stats Using Baseball Cards to Highlight the Connections Between Various Mathematical Concepts
	Fun with Fractions Developing the Length Model
	Fun with Fractions Developing the Set Model
	Fun with Fractions Developing the Region Model
	Geology Rocks Equations Using Manipulative Blocks and Counters to Explore Equations such as 3x = 2x + 12
	Geometric Solids and Their Properties Exploring Three-Dimensional Shapes
	Geometry in the World of Art Using the Works of Wassily Kandinsky to Exemplify Geometric Shapes
	Geometry of Circles Exploring The Relationship Between Diameter, Circumference, And Area
	Get the Turtle to the Pond Using Geometry and Measurement Concepts to Create Paths
	Getting into the Electoral College Exploring the Mathematics and Paradoxes of the Election System in the United States
	Golden Ratio Extending the Fibonacci Sequence through an Algebra Exploration
	Graphing Trash Material Investigating Data about Recyclable Materials and Planning to Help the Environment
	Graphs from the Unit Circle Making the Connection between Trigonometric Ratios and Graphs of Sine and Cosine Functions
	Grid and Percent It Using a 10 × 10 Grid to Solve Percent Problems
	Growth Rate Using Slope to Approximate Rate of Change on a Graph
	Hanging Chains Determining the Equation of a Parabola
	Hay Bale Farmer Using Volume and Unit Rates to Determine Best Values for Hay Bales
	Heartifacts Exploring Important Heart Facts
	Heights of Students in Our Class Creating a Box‑and‑Whisker plot Using Height Data
	Here's a Handful Exploring the Number 5
	High Temperature Identifying Number Patterns
	Hitting Your Mark Constructing a Scale Drawing of a Regulation Dartboard Using Geometry and Measurement
	Hospital Locator Using Incenters and Circumcenters to Solve Real-World Problems
	How Big is Your Heart? Connecting Science and Math by Exploring Your Own Heart
	How Do You Organize the Counties in Your State? Ordering, Comparing, and Writing Census Data in Multiple Ways
	How Long? How Wide? How Tall? How Deep? Using Historical Units of Measure (Body Parts) to Find Length
	How Many More Fish? Exploring Five Representations of Subtraction
	How Many Steps? Measuring Distance with Standard and Nonstandard Units
	How Much Is a Million? Using Sampling Techniques to Discern How Big a Million Really Is
	How Tall? Discovering the Correlation between Body Measurements and Height using Linear Regression
	Ideas with Food Applying Various Mathematical Concepts While Preparing Simple Foods
	Impact of a Superstar Using Regression Analysis To Detect Outliers
	Inclined Plane Rolling Balls Down Ramps of Varying Lengths and Heights
	Inequalities in Triangles Investigating The Relationship Between Sides And Angles In A Triangle
	Information Represented Graphically Using Graphs to Analyze Information and Make Predictions
	Invest in Your Education Learning Percents by Purchasing Everyday Classroom Supplies
	Investigating Pick's Theorem Exploring Patterns, Systems of Equations, and Rates of Change While Finding the Area of a Triangle
	Investigating Shapes (Triangles) Recognizing, Constructing, and Identifying Triangles
	Island Inequality Mat Exploring the Concepts of Greater Than, Less Than, and Equal To
	I've Seen That Shape Before Learning the Names of Solid Geometric Shapes and Exploring Their Properties
	Junior Architects Designing Your Dream Clubhouse Using Measurement and Geometry
	Ladybug Lengths Using Nonstandard Units to Measure Length
	Law of Sines and Law of Cosines Discovering Formulas for Triangle Measure
	Learning about Properties of Vectors and Vector Sums Using Dynamic Software Understanding Vectors with Dynamic Geometric Representations
	Least Squares Regression Interpreting the Real-Life Meaning of Graphical Representations of Data
	Let's Count to 20 Making Groups of 10 to 20 Objects, Connecting Number Names to the Groups
	Let's Count to 5 Connecting Number Words to Groups of Objects
	Let's Learn Those Facts Playing Games and Using Number Properties to Learn Addition Facts
	Light It Up Using a Mirror and Flashlight to Understand Rational Functions
	Line 'Em Up Points in the Coordinate Plane
	Linear Alignment Exploring Linear Equations using Polygons on a Graphing Calculator
	Linking Length, Perimeter, Area, and Volume Investigating Ratio, Proportion, Scale Factor, and Similarity Using Various Rectangular Shapes
	Links Away Exploring Subtraction Properties with Five Models of Subtraction
	Location, Location, Location Exploring Distances to the Sides in a Regular Polygon
	Long Distance Airplanes Increasing the Flight Distances of Paper Airplanes
	Look at Me Collecting Data and Displaying It With Tally Marks, Pictographs, Bar Graphs, and Glyphs
	Macaroni Math Exploring "Take Away" Subtraction in Several Different Contexts
	Magic Squares Exploring Magic Squares from an Historical and Mathematical Perspective
	Magnificent Measurement Using Objects, Pictures, & Symbols to Measure Length, Area, Volume, Time, & Weight
	Makeshift Measurements Using Common Objects as Benchmark Measurements
	Making Sense of Percent Concentrations Using Beads and an Antifreeze Chart to Understand Mixture Problems
	Mars Orbit Using Parametric Equations to Investigate the Relative Orbits of the Planets
	Math Vocabulary Bingo Emphasizing the Understanding and Application of Mathematical Terminology with an Interactive Teaching Tool
	Mathematics and Children's Literature Using Stories as the Context for Mathematical Discovery
	Mathematics and Environmental Concerns Investigating Data in Connection with Recyclable Materials and Developing Plans to Help the Environment
	Mathematics and Football Analyzing Information Represented Graphically
	Mathematics as Communication Graphing Information Collected Over Time
	Measuring Up Using Your Own Measurements to Explore Similar Figures
	Modeling Orbital Debris Problems Using Technology to Develop an Understanding of Functions and Modeling
	Movement with Functions Using Movement to Analyze Linear Functions and Systems of Equations
	Movie Lines Using Algebra to Model Linear Relationships
	Multiplication: It's in the Cards Using the Properties of Multiplication to Master the Multiplication Facts
	Multiplying Integers Using Videotape Exploring Integers Using the Forward and Rewind Features
	My Pet Creating a Map of a Pet
	National Debt and Wars Curve-Fitting, Exponential Growth, and Percent Change
	Number Cents Exploring the Relationship Between Pennies, Nickels, Dimes, Quarters, and Examining Combinations
	Numbers and Language Discussing, Describing, Reading, and Writing Numbers to Help Develop Number Sense
	Numbers and Me Getting to Know Your Classmates
	Numerical and Categorical Data Collecting, Organizing, and Displaying Data to Answer Questions
	On Fire Using Measurement to Design A Fire-Wise Property
	On Top of the World Seeing to the Horizon from the Top of Mount Everest
	One Grain of Rice How Knowledge of Exponential Growth Can Feed a Village
	Orbiting Satellites Determining Altitude and Velocity
	Order of Operations Bingo Evaluating Expressions to Play Bingo
	Paper Pool Analyzing Numeric and Geometric Patterns
	Paper Quilts Using Translation, Reflection, Rotation, and Line Symetry to Make Four-Part Quilt Squares
	Patterns and Functions Investigating Properties of Perimeter and Area of Two‑Dimensional Shapes
	Patterns That Grow Extending Number and Shape Patterns
	Paying for Your Wheels The Algebra of Gas Consumption
	Pedal Power Interpreting Slope as a Rate of Change
	Perplexing Parallelograms Using Multiple Strategies to Solve a Problem Involving the Area of Parallelograms
	Petals Around the Rose Identifying Patterns in a Dice Game
	Pi Filling, Archimedes Style! Bringing Archimedes’ Method to Life in the Geometry Classroom
	Pi Line Plot Circumference and Diameter to Determine Pi
	Picture This Collecting Data About the Number Sentences People Associate with a Picture
	Pieces of Proof Using puzzle pieces to put together formal proofs, from a collection of statements and reasons.
	Pinwheel Investigating the Geometry of an Origami Octagon that Changes Shape
	Pitching Cards Measuring Distances
	Pizza, Pizza! Gathering, Representing, and Interpreting Data About Pizza Choices
	Planning a Playground Exploring Maximum Area with a Set Perimeter and Obstacles
	Planning a Trip Creating a Travel Plan by Studying Maps, Considering Possible Routes, and Examining Airfares
	Playing Games Developing concepts of Measurement and Statistics
	Polynomial Puzzler Solving Puzzles to Strengthen Understanding of Expanding and Factoring Polynomials
	Popcorn, Anyone? Exploring Volume using Differently Shaped Popcorn Containers
	Power of Points Using Dynamic Geometry Software to Investigate the Power of Points With Respect to a Circle
	Power Up Using Batteries as a Physical Model to Explore the Addition of Signed Numbers
	Powerful Patterns Exploring Patterns from Physical Education, Science, and Social Studies
	Predicting Your Financial Future Calculating Compound Interest with Savings Accounts and Credit Cards
	Printing Books Exploring the Relationships Among Lines, Slopes, and y‑Intercepts in the Context of Printing Their Algebra Textbooks
	Probability Explorations Exploring Theoretical and Experimental Probability
	Puzzling Relationships Using Tangram Puzzles to Explore Spatial Relationships
	Rates and Taxes Determining the Amount of Tax a Family Will Pay Based on a Certain Income
	Real Estate Tycoon Working With Fractions and Decimals to Design and Sell a House and Invest the Profits
	Rectangles and Parallelograms Examining the Properties of Two-Dimensional Shapes
	Representing Data Creating Graphs and Rules from an Organized Chart
	Rescue Mission Game Using Tally Tables and Bar Graphs to Learn About the Four Forces of Flight
	Rise-Run Triangles Using Right Triangles to Determine the Slope of a Line
	Road Trip! Investigating the Traveling Salesperson Problem
	Scaling Away Investigating the Effects of Scale Factor
	Scuba Diving in Belize Exploring Measurement While Researching And Planning A Diving Trip
	Security Cameras Exploring the Minimum Number of Security Cameras Needed to Monitor a Room
	Seeing Music Investigating How Sine Waves and Frequencies Cause Harmony and Dissonance
	Shedding Light on the Subject Developing and Analyzing Exponential Models For The Behavior of Light Passing Through Water
	Shopping Mall Math Developing Number Sense at a Shopping Mall
	Shrinking Candles, Running Water, Folding Boxes Finding Functions to Describe Real-World Phenomena
	Six and Seven as Factors Memorizing Products When 6 or 7 Is A Factor
	Sizing Up Investigate Clothing Sizes Between Companies and Countries
	Smokey Bear Takes Algebra Examining the Factors that Influence a Forest-Fire Danger Rating Index
	Sorting Polygons Identifying and Classifying Polygons According to Various Attributes
	Square Circles Using the Side-Perimeter Relationship in Squares to Identify the Diameter-Circumference Relationship in Circles
	Squares on a Triangle Using Dynamic Geometry Software to Discover the Law of Cosines
	Stacking Squares Representing Square- and Cube-Root Equivalences with Geometric Arrangements
	State Data Using Information about the 50 States as Data
	State Names Investigating Real-World Data
	Stick or Switch? Examining the Famous "Monty Hall Problem"
	Successive Discounts Examining Numeric, Algebraic, and Graphical Representations of Composition of Functions
	Sum Search Finding Sums of 5, 6, 7, and 8
	Summer Daze A Pie Graph review of Fraction, Decimal, and Percent
	Supply and Demand Using a System of Linear Equations to finding the Equilibrium Point for Supply and Demand Problems.
	Supreme Court Welcome Exploring the Handshake Problem
	Symmetries I Investigating Rotations and Their Properties
	Symmetries II Investigating Reflections and Their Properties
	Symmetries III Investigating Translations and Their Properties
	Symmetries IV Investigating Glide Reflections and Their Properties
	Take Away Introducing Young Children to Subtraction
	Taking Its Toll Examining the Relationship Between Tolls and Distance
	Talk or Text Choosing a Prepaid Cell Phone Plan Using Systems of Equations
	Tangram Puzzles Developing Geometric Understanding and Spatial Visualization Skills
	Tetrahedral Kites Studying The Relationship Between Linear, Area, And Volume Measures
	The Beat of Your Heart Exploring Applications Involving the Heart
	The Cost of a Great Looking Floor Determining the Cost of Constructing a Tile Floor Using Pattern Blocks
	The Cost of Being Late Calculating the Impact of an Outstanding Balance and Interest Rates
	The Devil and Daniel Webster Examining a Recursive Sequence in a Game Between the Devil and Daniel Webster
	The Giant Cookie Dilemma Dividing a Circle in Half by Constructing Concentric Circles
	The Next Billion Predicting When the World Population Will Reach 7 Billion
	The Product Game Discovering the Relationship Between Products and Factors
	The Regression Line and Correlation Fitting Lines and Curves to Data
	The Variable Machine Using Letters in Words to Represent Addends of a Sum
	There Has to Be a System for This Sweet Problem Problem Solving using Systems of Equations
	There is a Difference: Histograms vs. Bar Graphs Using Presidential Data to Compare Histograms and Bar Graphs
	Toy-Shop Numbers Finding and Using Numbers at the Toy-Shop
	Transformations and Frieze Patterns Students will identify and create Frieze patterns using transformations to identify the various classes of Frieze patterns.
	Travel in the Solar System Predicting the Events That Will Happen on Earth While You Travel Through Space
	Triangle Classification Using Geometric Theorems to Classify Triangles by Angles and Sides
	Trigonometry for Solving Problems Enhancing the Appreciation of Trigonometry as a Problem-Solving Tool
	Understanding Distance, Speed, and Time Relationships Using Simulation Software to Examine Two Runners on a Track
	Understanding Rational Numbers and Proportions Using Real-World Models to Develop Understanding of Fractions, Decimals, Unit Rates, and Proportions
	Using Cubes and Isometric Drawings Explore Polyhedra With Three-Dimensional Representations
	Using NBA Statistics for Box and Whisker Plots Creating and Comparing Box-and-Whisker Plots Using Information from Basketball Statistics
	Varying Motion Exploring Varying Displacement, Velocity, and Acceleration
	Venn Diagrams and Logic Using a Visual Approach to Direct, Indirect, and Transitive Reasoning
	Walk the Plank Using a Scale to Investigate x‑Intercepts and Negative Slope
	Water, Water Comparing Water Usage of Students to Astronauts
	Weather Watchers Making a Stem-And-Leaf Plot From Weather Data
	What Is The Best Chip? Conducting a Sales and Marketing Investigation
	What Should I Measure Next? How About Me! Measuring Heights and Arm Spans
	What’s Regular About Tessellations? Tiling the Plane with Regular Polygons
	What's in a Name? Using the Number of Letters in Student Names to Make Graphs and Glyphs
	Will the Best Candidate Win? Explore the Advantages and Disadvantages of Alternative Voting Methods

The National Council of Teachers of Mathematics is a public voice of mathematics education, providing vision, leadership, and professional development to support teachers in ensuring mathematics learning of the highest quality for all students. The views expressed or implied, unless otherwise noted, should not be interpreted as official positions of the Council.