A+Math
http://aplusmath.com/
This web site was developed to help students improve their math skills interactively. Visit our game room and play exciting games like Matho and Hidden Picture...Test your math skills with our Flashcards! Try out the Math Word Find puzzle. Create and print your own set of flashcards online! Try out the Flashcard Creator. See the Worksheets section, where you can print worksheets to practice offline.

AAA Math
http://www.aaamath.com/
Hundreds of pages of Basic Math Skills. Interactive Practice on every page. An Explanation of the math topic on each page. Several Challenge Games on every page. Math Problems are randomly created.

Playing With Time
http://www.playingwithtime.org/index.html

Kings Math
http://www.k111.k12.il.us/king/math.htm

Math Facts
http://home.indy.rr.com/lrobinson/mathfacts/mathfacts.html
Math Facts is an interactive flash card program for practicing math facts. The program generates addition, subtraction, multiplication, and division problems involving integers (i.e. the numbers may be negative optionally). It is especially designed for improving speed in calculation.

Playing with time
http://www.playingwithtime.org/index.html
Now it really is exciting to watch grass grow or a drop of water fall! Time waits for everyone at this site, where you can see time-lapse movies of forest regrowth, children painting, a bubble bursting, and other phenomena either compressed or accelerated in time . A variety of activities lets you manipulate time to grow your own tree or sequence a bursting balloon.

Ed's Math
http://www.practicalmoneyskills.com/english/pop/games/p_ed_bank.html

Table Chase
http://www.polyhedraldesign.com.au/samples/tablechase/table_chase_full.html
Multiplication game.

Polyhedral Design
http://www.polyhedraldesign.com.au/portfolio.htm
Tangrams and Tic Tac Toe

BBC Education Online, Number Time
http://www.bbc.co.uk/schools/numbertime/games/index.shtml

Do It with Dominoes
http://illuminations.nctm.org/lessonplans/prek-2/dominoes/index.html
Students will explore the four models of addition (counting, sets, number line, and balanced equations) using dominoes.

Comparing Connecting Cubes
http://illuminations.nctm.org/lessonplans/prek-2/connect_cubes/index.htm
Students explore the five models of subtraction (counting, sets, number line, balanced equations and inverse of addition) using connecting
cubes.

US Mint
http://www.usmint.gov/kids/

PBS Cyberchase, Games Central
http://pbskids.org/cyberchase/games.html

iMath Investigations
http://illuminations.nctm.org/imath/index.html

Educational Java Programs
http://www.arcytech.org/java/

National Library of Virtual Manipulatives
http://matti.usu.edu/nlvm/nav/vlibrary.html

Interactive Tangrams
http://www.math.usu.edu/matti/bin/tangrams/index.html

Tangram
http://www.cs.ruu.nl/~markov/kids/tangram/

Primary Games
http://www.primarygames.co.uk/index2.html

The MegaPenny Project
http://www.kokogiak.com/megapenny/
Aims to help by taking one small everyday item, the U.S. penny, and building on that to answer the question: "What would a billion (or a trillion) pennies look like?"

Noddy's Numbers
http://www.pbs.org/kids/noddy/playroom/games/nn4.html
Click on the digit that represents the collection.

Quilt Maker
http://www.licm.com/noFr.f/quiltNF.html
Design a quilt by clicking on the squares. 

Patterns in Math - Logic Patterns
http://www.learner.org/teacherslab/math/patterns/buttons/
The computer has secretly picked out one of the sixteen buttons you see. What you need to do is determine which button it is.

Zoom: Squares and Rectangles
http://www.pbs.org/wgbh/zoom/sci/squares-rectangles.html
Help us find out whether more people are squares or rectangles. Collect some data and enter your results through the cool form on this page. When we receive it, we'll add it to data we've received from other ZOOM viewers and calculate the overall results!

Tic Tac Toe Squares
http://www.funbrain.com/tictactoe/index.html

Fun Match
http://www7.funbrain.com/match/index.html

Connect Four
http://kayleigh.tierranet.com/java/Connect4/Connect4.htm
Online version of classic game. 

Sliders
http://www.mathsyear2000.org/games/Sliders/sliders.html
To start first choose one of the 4 different types of board, then click scramble. All you have to do now is to get the tiles back into their original order!! Just click on a tile with the mouse to move it into the adjacent space. 

Tactix
http://www.mathsyear2000.org/games/Tactix/tactix.html
Tactix is a two player game where players take it in turns to remove a counter or counters from the board. The aim of the game is to force your opponent (the computer) to remove the last counter from the board. 

Fiver
http://www.mathsyear2000.org/games/Fiver/fiver.html
To win you must convert all of the white counters into black counters. To change the colour of a counter, click on it with the mouse. However, beware - when a counter changes colour, so do those above, below, left and right of it!! 

Othello
http://www.mathsyear2000.org/games/Othello/index.html
Your objective is to fill the board with your color by surrounding your opponent. 

Hex
http://www.mathsyear2000.org/games/Hex-7/hex.html
The aim of the game is for players to connect their sides of the board with a continuous chain of their own pieces. 

Tangrams
http://www.mathsyear2000.org/games/Tangram/index.html
The objective of this Tangram applet is to make the same shape as the one in the top right corner. Of course you could always just make your own patterns. 

Berries
http://www.blueberry.co.uk/gid-bin/berries
The idea is to knock out the other player by converting their berries to your berries. This is done by putting a berry next to their berries. 

Flip Faces
http://www.bep.treas.gov/kids/faces/index1.htm
or
Who's on the Money?
http://www.sprocketworks.com/shockwave/load.asp?SprMovie=usmoneygameweb
Drag and drop the right people to the right bill. 

Finance Game
http://www.state.tn.us/financialinst/java/game/game.html
Use exact change to purchase products from Abe Lincoln. 

Us Mint Change Puzzles
http://www.usmint.gov/kids/clubhouse/games/puzzlemint/puzzlemint.html
Puzzles for the new quarters. 

Connect the Dots
http://www.funbrain.com/dots/index.html
Help Salvabear Dali finish his portraits of his friends by clicking on the dots in each picture in the correct order. Choose to count by 1s, 5s, or backwards. 

Oddball
http://www.funbrain.com/cgi-bin/ob.cgi?A1=s&A2=2
FunBrain will show you four shapes. Three of the pictures will be the same in some way, and one is different.Click on the one which does not belong in the group. If you get twenty problems correct, you can put your name on our leader board. 

Number Line
http://www.funbrain.com/linejump/index.html
FUNBRAIN will show you a number line. Click on the number line at the correct answer. 

MathCar Racing Game
http://www.funbrain.com/osa/index.html
Outdrive FunBrain's math car by getting the highest score. Choose a math expression from the row (side to side) that is highlighted. FunBrain will choose from the column (up and down) that you selected. Win points based on how difficult the problem is. Stay ahead of FunBrain. The heat will be on! 

One False Move
http://www.funbrain.com/ofm/index.html
You are stuck in a haunted house. Your goal is to find the door to get out. You are given a table of numbers. Click on the numbers in order from lowest to highest (or highest to lowest). 

Tic Tac Toe Squares
http://www.funbrain.com/tictactoe/index.html
Get three X's in a row (horizontal, vertical, or diagonal) before the computer gets three O's in a row. Each square on the board has a question. To place an X on a square, you must answer the given question correctly. The computer will place an O on the board after you place an X. 

Senet
http://www.discovery.com/games/senet/senet.html
The object of the game is to travel around the game board and remove all your pieces before your opponent. 

Ken White's Coin Flipping Page
http://shazam.econ.ubc.ca/flip/
Flip an online coin and see the data on past coin flips. 

Three Door Puzzle

There are three closed doors before you. Two are empty, and one contains a cash prize. Pick a door. 

Addition Surprise
http://www.harcourtschool.com/activity/add/add.html
Drag and drop sums to a number chart to reveal a hidden picture. 

Multiple Counting Practice
http://www.saxonpub.com/tech/count/count.html
Count by multiples. Beat you best time. 

Math Baseball
http://www.funbrain.com/math/index.html
Choose a level, a math topic, and "swing" for an answer. 

Number Cracker
http://www.funbrain.com/cgi-bin/cracker.cgi
Help Mr. Cracker obtain the secret code before the insidious Prof. Soup catches him by guessing what number comes next in a series of numbers. 

Kid Klock
http://mambo.ucsc.edu/htbin/kidklok.cgi
Set the time. 

Snap Dragon - Tell the Time
http://www.bbc.co.uk/wales/snapdragon/yesflash/time-1.htm
Set the clock. Submitted by G. BruneDynamo - Clockwise
http://www.bbc.co.uk/education/dynamo/den/clock/index.htm
Chose your level and set the clock. 

Willie the Watchdog
http://www.harcourtschool.com/activity/willy/willy.html
Two players roll a die, identify a time, and advance on a game board. 

Flash Cards for Kids
http://www.edu4kids.com/math/
Choose a level and an operation (addition, subtraction, division, multiplication).

Money Flashcards
http://www.aplusmath.com/cgi-bin/flashcards/money

Change Maker
http://www.funbrain.com/cashreg/index.html
Figure out how many of each bill or coin that you expect to get back when you pay for something. If you get the answer correct, the amount of change is added to your piggy bank. If you get the answer wrong, the correct amount of change is subtracted from your piggy bank. The more money you get in your piggy bank, the harder the questions will get. 

Pattern Games
http://www.funschool.com/cgi-bin/ga?ptk_insect1,1
Drag an insect to complete the pattern.

Changing Colors
http://www.cut-the-knot.com/pythagoras/colorchange.html
Clicking on a button (triangles on the sides of the board) swaps board colors either in a whole row or in a whole column. Is it possible to have all squares but one white?  

Pattern Blocks: Exploring Fractions With Shapes
http://www.best.com/~ejad/java/patterns/patterns_j.shtml
Drag and drop pattern blocks. 

Base Ten Blocks
http://www.best.com/~ejad/java/b10blocks/b10blocks.html
Drag and drop base ten blocks. 

Cuisenaire Rods
http://www.best.com/~ejad/java/integers/integers.html
Drag and drop Cuisenaire Rods. 

Snow Flake Designer (8 sides)
http://www.explorescience.com/activities/Activity_page.cfm?ActivityID=12
Folding a piece of paper and pulling out the scissors is always fun near the holidays. If you want to 'design' your snowflake before slicing the paper, start here! Plus it's symmetry, right? 
Snowflake with 8 sides:
http://www.explorescience.com/activities/Activity_page.cfm?ActivityID=13

The Crazy Pattern Machine
http://www.funschool.com/cgi-bin/ga?pt1_mech,1
Choose the shape to complete the pattern. 

Pattern Games
http://www.funschool.com/cgi-bin/ga?ptk_insect1,1
Drag an insect to complete the pattern. 

Subtracting Penguins
http://www.kidscarnival.com/PenguinSub.html
Choose the number that completes the subtraction problem. 

Know Your Numbers
http://www.kidscarnival.com/Numbers.html
Drag each picture to the word that describes it best. 

Counting Fun
http://www.kidscarnival.com/Counting.html
How many objects do you see?

How Many?
http://www.kidscarnival.com/Howmany.html
Drag each picture to the corresponding number. 

Penguin Addition
http://www.kidscarnival.com/PenguinAdd.html
Count the penguins and fill in the correct addition equation. 

Find the Hidden Numbers
http://www.funschool.com/cgi-bin/ga?azk_hh2,2

Juice Bottle Jingles
http://www.lhs.berkeley.edu/shockwave/jar.html
Play music by matching the numbers. 

The Counting Game
http://home.earthlink.net/~cmalumphy/countinggame.html
Match the number. 

Count Your Chickens
http://www.learningplanet.com/sam/cyc/cyc.htm
Count how many of each. 

The Counting Story
http://www.magickeys.com/books/count/index.html
The Counting Story: a story by Rolando Merino for his son Timmy. 

Preschool Numbers with Kylie Kangaroo
http://animabets.com/activities/k-numbers/numbers.html
Kylie Kangaroo is practicing her numbers. Click on a number and count the objects in the box on the right.

Buzzing With Shapes
http://www.harcourtschool.com/activity/buzz/buzz.html
A two-person game where users identify geometric shapes. 

Blue Dog Can Count
http://www.forbesfield.com/bdf.html
A dog barks the correct answer to number sentences. 

Counter Pyramid
http://www.sci-ctr.edu.sg/ssc/quiz/maths/puzzle1.html
The pyramid form below is made up of ten counters. By moving just three counters, turn the pyramid upside down. 

Time Experience for Kids
http://www.edu4kids.com/clock/
Time games.

Educational Java Programs
http://www.arcytech.org/java/

National Library of Virtual Manipulatives
http://matti.usu.edu/nlvm/nav/vlibrary.html

Mighty M&M Math
http://mighty-mm-math.caffeinated.org/main.htm

Find Grampy
http://www.visualfractions.com/FindGrampy.html

Welcome to Symmetry 
http://www.schools.ash.org.au/stkierans-manly/Classes/Yr6/6B/Symmetry/index.htm
Over the last couple of years the students of 6B, St Kieran's,  Manly Vale, Sydney, Australia have worked on a collection of web pages to help others around the world explore the concepts of line symmetry and rotational symmetry in the world around us.

Terrific Tessellations
http://www.hipark.austin.isd.tenet.edu/arc/projects/fourth/tesselations/tesselation.html
Highland Park fourth graders have been exploring and creating tesselations. They're fun and easy to create on the computer using such drawing programs as ClarisWorks. Take a look at what our students have created. 

Geometry
http://pittsford.monroe.edu/jefferson/calfieri/geometry/geoframe.html
This geometry review page will help master the concepts learned in class. Ideas will be reviewed with the assistance of graphics and sound to help you learn these important ideas. Even the titles contain clues as to the attributes of the geometric shape. After many of the pages are quizzes to help reinforce the ideas learned.

Tangram
http://www.cs.ruu.nl/~markov/kids/tangram/

National Library of Virtual Manipulatives
http://matti.usu.edu/nlvm/enu/navd/index.html

The Data Library
http://mathforum.org/workshops/sum96/data.collections/datalibrary/
The Data Library contains lists of ongoing data-sharing projects as well as downloadable spreadsheets and other sources of data on the web.

The Data and Story Library
http://lib.stat.cmu.edu/DASL/
An online library of data files and stories that illustrate the use of basic statistics methods. We hope to provide data from a wide variety of topics so that statistics teachers can find real-world examples that will be interesting to their students. Use DASL's powerful search engine to locate the story or datafile of interest.

Visual Fractions
http://www.visualfractions.com/

Global Grocery List
http://landmark-project.com/ggl/index.html

The Data Library
http://forum.swarthmore.edu/workshops/sum96/data.collections/datalibrary/

The Data and Story Library
http://lib.stat.cmu.edu/DASL/

Women and Geometry: An Archive of American Patchwork Quilt Designs
http://womensearlyart.net/quilts/

Pet Census 2001 
http://www.petcensus.phila.k12.pa.us/
Students around the country gather and submit data to answer these questions: What is the most common pet found in America? Are some pets more popular in specific regions of the country? Students then collaboratively explore different ways to graph and make inferences from the data.

The MegaPenny Project
http://www.kokogiak.com/megapenny/
Aims to help by taking one small everyday item, the U.S. penny, and building on that to answer the question: "What would a billion (or a trillion) pennies look like?"

The National Math Trail  
http://www.nationalmathtrail.org/
With the philosophy "math is all around you," the National Math Trail project challenges K-12 teachers and teams of students to observe their surroundings, and create math problems about what they see and what they want to figure out. Teachers can find examples of math trail projects and other resources on this site.  Register, and you can submit your class's math trails for posting on the web site.

Quilt Maker
http://www.licm.com/noFr.f/quiltNF.html
Design a quilt by clicking on the squares. 

Patterns in Math - Logic Patterns
http://www.learner.org/teacherslab/math/patterns/buttons/
The computer has secretly picked out one of the sixteen buttons you see. What you need to do is determine which button it is.

Zoom: Squares and Rectangles
http://www.pbs.org/wgbh/zoom/sci/squares-rectangles.html
Help us find out whether more people are squares or rectangles. Collect some data and enter your results through the cool form on this page. When we receive it, we'll add it to data we've received from other ZOOM viewers and calculate the overall results!

Figure This
http://figurethis.org/challenges/challenge_index.htm
A series of interactive problem solving activities.

Lemonade Stand
http://gameorama.com/games/lemonade.html
Each evening you look at the weather forecasts and choose what stocks to buy to sell to your customers on the following day. Cups of Coffee sell well on cold days and Glasses of Lemonade sell well on hot days. You have three weeks to try to make as much profit as you can.

EduStock
http://library.thinkquest.org/3088/
Edustock is an educational web page designed to teach young and old alike, what the stock market is, and how it can work for them. It includes tutorials on the stock market and how to pick good stocks. It also provides information on a select group of companies to help you start your research into what stock is going to make your fortune. Last of all, it provides a FREE 20 minute delayed Stock market simulation on the World Wide Web.

Connect Four
http://kayleigh.tierranet.com/java/Connect4/Connect4.htm
Online version of classic game. 

Sliders
http://www.mathsyear2000.org/games/Sliders/sliders.html
To start first choose one of the 4 different types of board, then click scramble. All you have to do now is to get the tiles back into their original order!! Just click on a tile with the mouse to move it into the adjacent space. 

Tactix
http://www.mathsyear2000.org/games/Tactix/tactix.html
Tactix is a two player game where players take it in turns to remove a counter or counters from the board. The aim of the game is to force your opponent (the computer) to remove the last counter from the board. 

Fiver
http://www.mathsyear2000.org/games/Fiver/fiver.html
To win you must convert all of the white counters into black counters. To change the colour of a counter, click on it with the mouse. However, beware - when a counter changes colour, so do those above, below, left and right of it!! 

Othello
http://www.mathsyear2000.org/games/Othello/index.html
Your objective is to fill the board with your color by surrounding your opponent. 

Hex
http://www.mathsyear2000.org/games/Hex-7/hex.html
The aim of the game is for players to connect their sides of the board with a continuous chain of their own pieces. 

Tangrams
http://www.mathsyear2000.org/games/Tangram/index.html
The objective of this Tangram applet is to make the same shape as the one in the top right corner. Of course you could always just make your own patterns. 

Apple Turnover
http://clevermedia.com/game.cgi?turnover
Place your pieces to capture more of the board than the computer does. 

Berries
http://www.blueberry.co.uk/gid-bin/berries
The idea is to knock out the other player by converting their berries to your berries. This is done by putting a berry next to their berries. 

Corners Board
http://www.geocities.com/CapeCanaveral/9586/CornersBoard.htm
A strategic board game where you must get all your pieces to the opposite corner before the computer.

Yahtzee
http://irt.org/games/js/yahtzee/index.htm?p=2
A very competent Yahtzee game - one of the better ones on the web. It allows for games with one to eight players. 

ThinkAhead
http://gamescene.com/game.cgi?thinkahead
A fun and interesting numbers game - you have to get a higher total than the computer. Pick the right number in each row and the computer is forced to make a bad choice. Remember to think ahead!

Pentiminoes
http://clevermedia.com/game.cgi?pentominoes
Fit the pentomino shapes into the grid. If at first you don't succeed try, try again. 

GoMath
http://www.gomath.com/
The tutorials are pretty good - not easy. 

Baseball Time Machine
http://www.exploratorium.edu/baseball/timemachine.html
Choose a player then move them through time to see how their batting average would change. What would Babe Ruth's average be today? 

Kids Graphing Page
http://nces.ed.gov/nceskids/Graphing/
Use this site to make a bar graph, circle graph (pie chart), or line graph using your own data. Select the type of graph and then click Go. There's a brief description and an example of each type of graph as well. 

Rubik's Online
http://www.rubiks.com/cubeonline.html
Are you ready for a challenge? Scramble the cube. Then try to make each face on this Rubik's® cube all one color. Sounds easy? Just try it! 

Shadows
http://www.learner.org/teacherslab/math/geometry/space/shadows/index.html
Can you guess what type of shadow a three-dimensional shape can make? 

Soma
http://users.ids.net/~salberg/soma/Soma.html
Can you guess what type of shadow a three-dimensional shape can make? Can you put the seven pieces together to form a cube? After you master the cube, try one of other figures. 

Virtual Cube
http://www.cs.umbc.edu/~sli2/cube/cube.html
The key to this game is to get all sides of the cube to a single color. Press Scramble. Use your left mouse button to view the entire cube. Use your right mouse button to rotate the rows. Too hard? Press Solve and watch it go back to the right order. 

Mayan Games
http://users.ccnet.com/~laplaza/maya/maya.htm
Solve these Mayan math puzzles and learn about Mayan mathematics at the same time. Levels get progressively harder. 

Shape Surveyor Geometry Game
http://www.funbrain.com/poly/index.html
You will be shown a rectangle with the dimensions labeled. You must calculate the area or perimeter of the rectangle.For each problem you get correct, you will receive a piece of an archeological puzzle. The game is over when you get all the puzzle pieces. 

Number Line
http://www.funbrain.com/linejump/index.html
FUNBRAIN will show you a number line.Click on the number line at the correct answer. 

MathCar Racing Game
http://www.funbrain.com/osa/index.html
Outdrive FunBrain's math car by getting the highest score. Choose a math expression from the row (side to side) that is highlighted. FunBrain will choose from the column (up and down) that you selected. Win points based on how difficult the problem is.Stay ahead of FunBrain. The heat will be on! 

One False Move
http://www.funbrain.com/ofm/index.html
You are stuck in a haunted house. Your goal is to find the door to get out.You are given a table of numbers. Click on the numbers in order from lowest to highest (or highest to lowest). 

Tic Tac Toe Squares
http://www.funbrain.com/tictactoe/index.html
Get three X's in a row (horizontal, vertical, or diagonal) before the computer gets three O's in a row. Each square on the board has a question. To place an X on a square, you must answer the given question correctly. The computer will place an O on the board after you place an X. 

Soccer Shootout
http://www.funbrain.com/fractop/index.html
Score and block goals by correctly solving fractional equations. Alternate between scoring and blocking goals made by the opposing team. 

Senet
http://www.discovery.com/games/senet/senet.html
The object of the game is to travel around the game board and remove all your pieces before your opponent. 

The Lemonade Stand
http://www.coolmath4kids.com/lemonade/index.html
In this game make as much money as you can in 30 days by opening a lemonade stand. 

BasketMath
http://www.mathgoodies.com/software/basketmath.shtm
BasketMath© is an arcade style mathematics test presented in a basketball game format. The object of the game is for the home team to score more points than the visiting team, while completing a mathematics test. 

MathBots
http://www.frontiernet.net/~astrobot/
MathBOTs is a rigorous, arcade-quality math facts drill game for Grades K-5. Learn addition, subtraction, multiplication, and division math facts at WARP SPEED! Repel approaching math facts by firing answers from the 3-D front view point of a starship. 

FunBrian QuizLab
http://www.funbrain.com/quiz/index.html
Create your own quizzes with Quiz Lab's easy-to-use authoring tool. Students take the quiz online and quiz results are graded automatically with scores emailed to you, the teacher. 

FunBrain Power Football
http://www.funbrain.com/football/index.html
FUNBRAIN will give you a math problem. Enter the answer to the problem and hit the "Go" button. If your answer is correct, the ball will move in the air towards to goalpost. If you answer incorrectly, you lose a down (a turn). If the ball goes through the goalpost, you score. If you answer the next question correctly, you get the ball back and the downs go back to zero. The game is over when you go four downs without scoring. 

Ken White's Coin Flipping Page
http://shazam.econ.ubc.ca/flip/
Flip an online coin and see the data on past coin flips. 

Three Door Puzzle

There are three closed doors before you. Two are empty, and one contains a cash prize. Pick a door.

Matho
http://www.aplusmath.com/cgi-bin/games/addmatho
Math version of bingo. 

High Rise Math
http://www.harcourtschool.com/activity/hrise/hrise.html
Roll an online die, solve addition problems, and compete against another player to make it to the top of the high rise.

Multiple Counting Practice
http://www.saxonpub.com/tech/count/count.html
Count by multiples. Beat you best time. 

Math Baseball
http://www.funbrain.com/math/index.html
Choose a level, a math topic, and "swing" for an answer. 

Money Match
http://www.harcourtschool.com/activity/con_math/g03c07.html
Match the equivalent amounts of money. 

National Library of Virtual Manipulaties 
http://matti.usu.edu/nlvm/nav/vlibrary.html

NCTM, Principles & Standards: Electronic Samples
http://standards.nctm.org/document/eexamples/#Pre-K-2

NCTM Illuminations
http://illuminations.nctm.org/
"Welcome to the Illuminations website! This site is designed to "illuminate" the new NCTM Principles and Standards for School Mathematics.  On this site you will find Internet resources to improve the teaching and learning of mathematics for all students."

King’s Math 
http://www.k111.k12.il.us/king/math.htm
This Hotlist organizes most of students’ basic math needs into categories, then links the user to directly to webpages that have a tool or game to meet that need.