We use Everyday Math as our math curriculum at Ann K Heiman Elementary.  To help us remediate and enrich our students, we use the following web sites.  They can be used at all academic levels.  The lower you go down the list, the more challenging they are for students.
 

Counting/Number Sense

Counting Woozies (Pictorial) http://www.toytheater.com/howmany.html

Speedy Pictures (Pictorial -this site takes some time to load, but is worth the wait) http://www.fi.uu.nl/toepassingen/00203/toepassing_rekenweb.xml?style=rekenweb&language=en&use=game

What number is missing?  Numbers from 1 - 10.  http://www.haelmedia.com/html/mc_mk_001.html

How Many? http://www.learningplanet.com/sam/cyc/index.asp

Count the Bananas (very auditory!) http://www.storyplace.org/preschool/activities/monkey.asp

One to One Correspondance http://www.primaryresources.co.uk/online/princes_1to1_level2.swf

EDM Build A Train Game http://media.emgames.com/emgames/demosite/playdemo.html?activity=M1A041&activitytype=dcr

EDM Spin a Number http://media.emgames.com/emgames/demosite/playdemo.html?activity=M1A042&activitytype=dcr

Ant Parade  http://homework-help.aol.com/article/factfile/_a/learning-game-ant-parade/20060825103909990001

Can you Make Five? Ten? One Hundred? http://www.amblesideprimary.com/ambleweb/mentalmaths/numberbond.html

Ten Frame Bus Counting Activity http://www.abc.net.au/countusin/games/game7.htm

Do you know all the numbers?  http://www.ababasoft.com/kids/1_2_3.html

What Comes Next ?  http://www.learningplanet.com/act/123order.asp

Guess The Number (Like Monster Squeeze) http://www.amblesideprimary.com/ambleweb/mentalmaths/guessthenumber.html

Give the dog a bone (100s Chart) http://www.oswego.org/ocsd-web/games/DogBone/gamebone.html

Interactive 100s Chart http://www.interactive-resources.co.uk/mathspack1/nsquares/nsquare100.html

 

Comparing Numbers

EDM Monster Squeeze Game http://media.emgames.com/emgames/demosite/playdemo.html?activity=M1A045&activitytype=dcr

Ordering Numbers to 100 http://www.haelmedia.com/html/og_m1_001.html

Comparing Numbers Multiple Choice Practice http://www.haelmedia.com/html/mc_m1_005.html

Greater or Less Than http://www.crick.northants.sch.uk/assets/Flash%20Studio/cfsmaths/Compare/ncmenu.swf

Ordering Decimals Least to Greatest Practice http://www.haelmedia.com/html/og_m76_001.html

Comparing Exponential Expressions http://www.haelmedia.com/html/mc_m65_003.html

 

Measurement

Measure the Teddy Bears http://www.apples4theteacher.com/measure.html

Funbrain's Measure It http://www.funbrain.com/measure/index.html

The Ruler Game http://www.rickyspears.com/rulergame/

Matching Equivalent Measurements Concentration Game http://www.haelmedia.com/html/mg_m54_002.html

 

Place Value

Base Blocks (Pictorial) http://nlvm.usu.edu/en/nav/frames_asid_152_g_1_t_1.html

Jumping on the Numberline (Pictorial) http://www.fi.uu.nl/toepassingen/03106/task1.html

Partition (pictorial ten rods and ones) http://atschool.eduweb.co.uk/toftwood/partition.html

Numbers in Expanded Form Multiple Choice Practice http://www.haelmedia.com/html/mc_m2_004.html

EDM's Number Top-It http://media.emgames.com/emgames/demosite/playdemo.html?activity=M2A050&activitytype=dcr

 

Place Value/Rounding

Interactive Rounding Practice http://www.haelmedia.com/html/mc_m54_001.html

Place Value Magnetic Chalkboard (to hundreds) http://home.freeuk.net/elloughton13/math81.htm

Arrow Cards http://www.interactive-resources.co.uk/mathspack1/placeval/placeval2.html

Place Value (smartboard friendly) http://www.primaryresources.co.uk/online/numberboard.swf

 

Time

Interactive Analog Clock http://www.amblesideprimary.com/ambleweb/mentalmaths/clock.html

Willie the Watch Dog http://www.harcourtschool.com/activity/willy/willy.html

Bang on Time http://www.oswego.org/ocsd-web/games/BangOnTime/clockwordres.html

 

Addition/Subtraction

Teddy Bear Addition (Pictorial) http://www.pitara.com/activities/math/algebra/as2.asp

Base Blocks Addition (Pictorial) http://nlvm.usu.edu/en/nav/frames_asid_154_g_1_t_1.html

Matching Pictures to Number Sentences http://www.haelmedia.com/html/mc_m1_001.html

Speedy Sums http://www.mathplayground.com/SpeedySums.html

Subtract It http://www.mathplayground.com/Subtract_It.html

Addition and Subtraction PRACTICE online with feedback http://www.schoolexpress.com/funtime/math_generator/add-online.php

Addition Attack (Addition Space Invaders) http://funschool.kaboose.com/formula-fusion/number-fun/games/game_addition_attack.html

Math Popper http://funschool.kaboose.com/formula-fusion/carnival/games/game_math_popper.html

Planet Blaster http://www.aplusmath.com/Games/PlanetBlasterBasics/index.html

Powerline Puzzle http://www.primarygames.co.uk/pg2/powerlines/powerlines1.html

 

Doubles

Bridge Doubles (in order)http://www.ictgames.com/bridgedoubles.html

Dartboard Game http://www.bbc.co.uk/schools/numbertime/games/dartboard.shtml

Robin Hood Archery Doubles http://atschool.eduweb.co.uk/toftwood/robindoubles.html

Robin Hood Doubles Beyond Ten http://atschool.eduweb.co.uk/toftwood/rhoodbeyond10.html

Doubles Concentration Game http://www.haelmedia.com/html/mg_m2_002.html

The Table Trees (pick the *2 tree) http://www.amblesideprimary.com/ambleweb/mentalmaths/tabletrees.html

Two Player Table Mountain (pick *2) http://www.teachingtables.co.uk/tm/tmgame/twopgame.html

 

Even/Odd/Prime/Compostite

Odd Even Swing http://www.primaryresources.co.uk/online/swingingted.swf

Ghost Blasters Operation Even Numbers Game  http://www.oswego.org/ocsd-web/games/Ghostblasterseven/ghosteven.html

Drag and Drop http://www.crick.northants.sch.uk/assets/Flash%20Studio/cfsmaths/Odds%20Evens/npmenu.swf

Prime and Composite Numbers http://www.harcourtschool.com/activity/elab2004/gr5/10.html

 

Math Fact Practice ALL Operations

Math Flash (Pictorial Option) http://www.mcps.k12.md.us/schools/thurgoodmarshalles/java-applets/Mathflash.html

(or use this site) http://www.mcps.k12.md.us/schools/thurgoodmarshalles/java-applets/Mathflash/Mathflash_small.html

Online Basic Fact Worksheet with Feedback http://66.216.68.87/activities/basic_fact_sheets/index.html

Are you a Math Magician - http://www.oswego.org/ocsd-web/games/Mathmagician/maths1.html

Name that Number (with 2 cards) http://media.emgames.com/emgames/demosite/playdemo.html?activity=M2A077&activitytype=dcr

Number Factory (this is similar to Krypto) http://www.fi.uu.nl/toepassingen/00013/toepassing_rekenweb.xml?style=rekenweb&language=en&use=game

Make 24 (similar to Krypto - target always 24) http://www.fi.uu.nl/toepassingen/00008/toepassing_rekenweb.xml?style=rekenweb&language=en&use=game

Calculator Chaos (Broken Calculator Game in EDM) http://www.mathplayground.com/Calculator_Chaos.html

Go Karts (for 1 or 2 players) http://funschool.kaboose.com/formula-fusion/carnival/games/game_go-go_go-karts.html

Your Number is Up (for 1 to 5 players) http://www.amblesideprimary.com/ambleweb/mentalmaths/gameshoweasy.html

Bowling Pin Math (*read directions!) http://www.mrnussbaumgames.com/bowling/index.html

Math Facts (gives a quiz and gives a practice facts list.) http://home.indy.rr.com/lrobinson/mathfacts/mathfacts.html

 

Math Fact Practice Addition/Subtraction

Addition Surprise http://www.harcourtschool.com/activity/add/add.html

Arithmetic Four (1 or 2 players) http://www.shodor.org/interactivate/activities/ArithmeticFour/

Batter's Up Baseball (Addition) http://www.prongo.com/math/addition.html

Hidden Picture (Addition) http://www.aplusmath.com/games/picture/AddPicture.html

Hidden Picture (Subtraction) http://www.aplusmath.com/games/picture/SubPicture.html

 

Math Fact Practice Multiplication/Division

The Skip Counting Game http://members.learningplanet.com/act/count/free.asp?contentid=1502

Spacey Math http://www.learningplanet.com/sam/sm/index.asp?contentid=177

Meteor Multiplication http://arcademic.altec.org/games/meteor/meteor.html

Multiflyer (Multiplication)

Batter's Up Baseball (Multiplication) http://www.prongo.com/math/multiplication.html

Math Munchers (Multiplication)  http://www.mathplayground.com/Math_Munchers.html

Balloon Invaders (Multiplication/Division) http://www.mathplayground.com/Balloon_Invaders.html

The Table Trees (Multiplication/Division) http://www.amblesideprimary.com/ambleweb/mentalmaths/tabletrees.html

EDM's Baseball Multiplication http://www.gdbdp.com/multiflyer/play_online.html http://media.emgames.com/emgames/demosite/playdemo.html?activity=M2A073&activitytype=swf

Factor Bingo http://media.emgames.com/emgames/demosite/playdemo.html?activity=M2A070&activitytype=dcr

 

Money

Spending Spree http://www.primarygames.com/Spending%20Spree/1b.htm 

Matching Dimes with Money Amounts http://www.haelmedia.com/html/mc_mk_003.html

Counting Coins http://www.haelmedia.com/html/og_m1_001.html

Making Change from 1.00 http://www.haelmedia.com/html/mc_m3_005.html

Underwater Shopping Mall http://homework-help.aol.com/article/factfile/_a/learning-game-underwater-shopping-mall/20060825104709990001

Piggy Bank Tetris http://fen.com/studentactivities/Piggybank/piggybank.html

Money Matching Game  http://www.quia.com/mc/65704.html

Change Maker http://www.funbrain.com/cgi-bin/cr.cgi

Buy It http://www.lizardpoint.com/fun/java/buyit/BuyIt.html

Lemonade Larry (also multiplication) http://www.prongo.com/lemon/game.html

Farm Stand http://www.prongo.com/farm/index.html

 

Decimals/Fractions

Fractions to Decimals Multiple Choice Practice http://www.haelmedia.com/html/mc_m76_002.html

Death to Decimals Game http://www.mrnussbaumgames.com/death_decimals/index.html

Equivalent Fractions to Decimals Concentration Game http://www.haelmedia.com/html/mg_m3_003.html

 

Fractions

 

What is a Fraction?

Fraction Maker http://www.interactive-resources.co.uk/mathspack2/fmaker/fracmake.html

WebMath: Get a Fraction (get a visual picture) http://www.webmath.com/k8if.html

Fraction Model I (good for improper fractions) http://illuminations.nctm.org/ActivityDetail.aspx?ID=11

Fraction Model II ( numerator/denominator to 20) http://illuminations.nctm.org/ActivityDetail.aspx?ID=44

Fraction Model III (numerator/denominator to 100) http://illuminations.nctm.org/ActivityDetail.aspx?ID=45

Math Matching... Fractions to Models http://www.harcourtschool.com/activity/con_math/g03c21.html 

Naming Fractions http://nlvm.usu.edu/en/nav/vm1_asid_104.html

Mystery Picture with Fraction Word Problems (by Dositey) http://www.dositey.com/math/mistery2.html

Flitting with Fractions http://www.learningmedia.co.nz/online_activities/flitting_with_fractions/

Fraction Flags http://www.oswego.org/ocsd-web/games/fractionflags/fractionflags.html

Equivalent Fractions & Comparing Fractions

Equivalent Fraction Diagram http://www.interactive-resources.co.uk/mathspack1/equivfrac/fracdrag.html 

Equivalent Fractions http://illuminations.nctm.org/ActivityDetail.aspx?ID=80

Fraction Frenzie Activity by LearningPlanet ( match equivalent fractions before time runs out) http://www.learningplanet.com/sam/ff/frenzy.htm

Fraction Game  (move game pieces to other side of board) http://illuminations.nctm.org/ActivityDetail.aspx?ID=18

Mighty Math Matching... Equivalent Fractions http://www.harcourtschool.com/activity/con_math/g04c20.html

Fresh Baked Fractions Activity by Funbrain( find fraction that is not equivalent to the rest)  http://www.funbrain.com/fract/index.html

Soccer Shootout Activity by Funbrain( addition and subtraction of fractions) http://www6.funbrain.com/fractop/index.html

High Low Fractions (Pictorial) http://www.mathplayground.com/Fraction_Game.html

Fraction/Decimal/Percents

Matching Fractions and Percents (Concentration) http://www.mathplayground.com/Matching_Fraction_Percent.htm

Math Matching... Fractions and Decimal Equivalents http://www.harcourtschool.com/activity/con_math/g04c22a.html

Math Matching... MORE Fractions and Decimal Equivalents http://www.harcourtschool.com/activity/con_math/g03c23.html

Math Matching... MORE Fractions and Decimal Equivalents http://www.harcourtschool.com/activity/con_math/con_math.html

Math Matching... Fractions, Decimal, % Equivalents http://www.harcourtschool.com/activity/con_math/g05c28.html

Salon Snap Activity by BBC Maths Files ( match fractions to decimals and %) http://www.bbc.co.uk/education/mathsfile/shockwave/games/saloonsnap.html 

Double Fun Match Activity (Click on Fraction/Decimal) by Funbrain (Match Fractions to Decimal Equivalent) http://www.funbrain.com/match2/index.html

Fraction Decimal Conversion ( JAVA games matching fractions to equivalent decimals) http://www.quia.com/jg/65724.html

Finding a Least Common Multiple (LCM) http://www.harcourtschool.com/activity/elab2004/gr6/4.html 

Fractions http://www.kidsolr.com/math/fractions.html

All About Fractions by AAA Math (Explanation, interactive practice and challenge games about fractions) http://www.aaamath.com/fra.html

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

I Know That: Fractions Workshop http://www.iknowthat.com/com/L3?Area=FractionsWorkbench

I Know That:Fishy Fractions http://www.iknowthat.com/com/L3?Area=FractionGame

 

Multiplying Fractions

Fractions of a Fractions (visual representation of multiplying fractions) http://www.nzmaths.co.nz/LearningObjects/fractions/index.swf

 

Geometry - Shapes

Polygon Shape Matching (Concentration) http://www.mathplayground.com/Matching_Shapes.html

Space Station (like tanagrams) http://homework-help.aol.com/article/factfile/_a/learning-game-space-station/20060825105909990001

Hidden Picture (geometry vocabulary) http://www.aplusmath.com/cgi-bin/games/geopicture

Triangle Sort  http://www.standards.dfes.gov.uk/primary/publications/mathematics/12884/nns_useict0260002venn.swf

Triangle Sort http://www.crick.northants.sch.uk/assets/Flash%20Studio/cfsmaths/Triangles/triangles.swf

Triangle Sort Multiple Choice Practice http://www.haelmedia.com/html/mc_m3_004.html

Polygon and Non Polygon Sort http://www.haelmedia.com/html/sg_m2_001.html

 

Geometry - Angles

Estimate the Angle Measurement http://www.mathplayground.com/Geometry_Angles.html

Guess the Random Angle (Can use a protractor.) http://www.primaryresources.co.uk/online/angle.swf

Is this a Right Angle? http://www.primaryresources.co.uk/online/powerpoint/rightangles.swf

Banana Hunt Game http://www.primarygames.co.uk/pg2/bhunt/bhunt.html

Right, Obtuse or Acute Angles http://www.haelmedia.com/html/mc_m76_003.html

 

Geometry - Symmetry/Reflections/Rotations

Symmetry Sort http://www.haelmedia.com/html/sg_m3_001.html

Reflections http://www.mathplayground.com/Perfectly_Symmetrical.html

Tubular Path Symmetry Fun http://nrich.maths.org/public/viewer.php?obj_id=5040&part=index&refpage=viewer.php

Pattern Rotations http://www.haelmedia.com/html/mc_m54_003.html

 

Geometry - Area & Perimeter

Rectangular Area Multiple Choice Practice http://www.haelmedia.com/html/mc_m3_004.html

 

Geometry - Tessellations

Tesselation Town (try to tessellate these shapes) http://www.mathcats.com/explore/tessellations/tesspeople.html

Quadrilateral Tessellations (scroll down the page)  http://www.cut-the-knot.org/Curriculum/Geometry/QuadTessellation.shtml

Make your own tessellation!  http://www.shodor.org/interactivate/activities/tessellate/?version=1.5.0_01&browser=MSIE&vendor=Sun_Microsystems_Inc.

Making Square Tessellation Patterns http://gwydir.demon.co.uk/jo/tess/sqtile.htm

Change the shape of this Tessellation http://faculty.evansville.edu/ck6/GIAJSP/Tessellate.html

 

Division (and Fractions)

Sharing Cookies (Pictorial) http://www.teacherlink.org/content/math/interactive/flash/kidsandcookies/kidcookie.php

EDM's Division Top It http://media.emgames.com/emgames/demosite/playdemo.html?activity=M5A009&activitytype=dcr

 

Word Problems

Thinking Blocks Addition/Subtraction (pictorial rectangle model) http://www.thinkingblocks.com/ThinkingBlocks_AS/TB_AS_Main.html

Thinking Blocks Multiplication/Division  (pictorial rectangle model  http://www.thinkingblocks.com/ThinkingBlocks_MD/TB_MD_Main.html

Math Millionaire http://www.mathplayground.com/Math_Millionaire.html

Math Hoops http://www.mathplayground.com/mathhoops_Z1.html

Word Problems with Katie and Arlo  http://www.actionmath.com/Katie1/Katiewp3.html

Grand Slam Math  http://www.actionmath.com/GSM1/GSMwp1.html

Grand Slam Math (Multiplication & Division) http://www.actionmath.com/GSM2/GSM2wp1.html

Fraction Word Problem Multiple Choice Practice http://www.haelmedia.com/html/mc_m76_004.html

 

Order of Operations

Funbrain Operation Order http://www.funbrain.com/cgi-bin/alg.cgi

 

Data

EDM Landmark Shark http://media.emgames.com/emgames/demosite/playdemo.html?activity=M5A006&activitytype=dcr

 

Number Theory

Exponent Practice http://www.haelmedia.com/html/mc_m87_002.html

Greatest Common Factor Multiple Choice http://www.haelmedia.com/html/mc_m76_001.html

This Number is a Multiple of __?  Practice http://www.haelmedia.com/html/mc_m2_003.html

"Which Number is Not a Factor?" Multiple Choice Practice http://www.haelmedia.com/html/mc_m65_001.html

 

Algebra

Algebra Planet Blaster http://www.aplusmath.com/Games/PlanetBlast/index.html

Weigh the Wangdoodles http://www.mathplayground.com/Wangdoodles.html

Algebra Puzzle http://www.mathplayground.com/Algebra_Puzzle.html

 

Patterns:

Room 108 Memory Game (this game is like SIMON only with color birds) http://www.tldsb.on.ca/Schools/GrandviewPS/Room_108/pattern/memory.html

Bug and Flower Pattern http://www.ictgames.com/fairyfog_random.html

CopyCat Jack Pattern Game (also like Simon) http://www.prongo.com/jack/index.html

Interactive Number Grids http://www.amblesideprimary.com/ambleweb/mentalmaths/squaremaker.html

Number Lines (Like Frames & Arrows)  http://www.amblesideprimary.com/ambleweb/mentalmaths/numberlines.html

 

Brain Teasers/Logic

A Maze of Directions Symmetry Fun (Challenging!) http://nrich.maths.org/public/viewer.php?obj_id=5039&part=index&refpage=monthindex.php

Websites to teach with...

Sokoban http://www.woodlands-junior.kent.sch.uk/Games/lengame/sokoban.html

Beach Button Challenge http://www.amblesideprimary.com/ambleweb/mentalmaths/buttons.html

 

Challenges (They get harder as you move down the list.)

Brainwave http://www.amblesideprimary.com/ambleweb/quizes/brain2.htm

Braintwister http://www.amblesideprimary.com/ambleweb/quizes/brain2.htm

Braindrainer http://www.amblesideprimary.com/ambleweb/quizes/bdrain.htm

Problems? No Problem http://www.amblesideprimary.com/ambleweb/mentalmaths/problems.html

The Totally Mental Math Machine: http://www.amblesideprimary.com/ambleweb/mentalmaths/mentalmachine2.html