Online Math games, quizzes, interactive tutorials, software
Elementary Math 1

The four operations

Calculator Chaos
Most of the keys have fallen off the calculator but you have to make certain numbers using the keys that are left.
www.mathplayground.com/calculator_chaos.html

ArithmeTiles
Use the four operations and numbers on neighboring tiles to make target numbers.
www.primarygames.com/math/arithmetiles/index.htm

Choose Math Operation
Choose the mathematical operation(s) so that the number sentence is true. Practice the role of zero and one in basic operations or operations with negative numbers. Helps develop number sense and logical thinking.
www.homeschoolmath.net/operation-game.php

MathCar Racing
Keep ahead of the computer car by thinking logically, and practice any of the four operations at the same time.
www.funbrain.com/osa/index.html

The Crazy Counting Machine
Make the target number by doubling, halving, adding 7, or subtracting 3.
www.crickweb.co.uk/assets/resources/flash.php?&file=crazyc

Math Scramble
Arrange the given numbers into the equation to make it true.
www.spacetime.us/arcade/play.php?game=3

Number Pyramid
Arrange the bottom numbers of the pyramid in order to achieve the highest/lowest possible number on the top.
www.crickweb.co.uk/assets/resources/flash.php?&file=PYRAMID3

Fill and Pour
Fill and pour liquid with two containers until you get the target amount. A logical thinking puzzle.
nlvm.usu.edu/en/nav/frames_asid_273_g_2_t_4.html

Math Mountain
Climb to the top of the mountain by answering simple math questions faster than your opponent (computer or human).
www.spacetime.us/arcade/play.php?game=23

Quick Calculate
Practice your arithmetic of all four operations plus order of operations. themathgames.com/arithmetic-games/addition-subtraction-multiplication-division/quick-calculate-game.php

Estimate Addition Quiz
Scroll down the page to find this quiz plus some others. Fast loading.
www.quiz-tree.com/Math_Practice_main.html

Mental Addition and Subtraction
A factsheet, quiz, game, and worksheet about basic mental addition and subtraction.
www.bbc.co.uk/skillswise/numbers/wholenumbers/addsubtract/mental/

The Abacus
History, instructions, articles about the age-old calculating aid.  
See also an interactive Java applet with a demo showing how counting and calculations are done. Nurtureminds.com sells workbooks that teach abacus.
www.ee.ryerson.ca:8080/~elf/abacus/index.html

Primary Paths
Web-based learning system for teachers, tutors or parents to set up arithmetic, word processing, or spreadsheet lessons for primary grade children.
Set up exercises, and let your child then practice basic arithmetic operations from simple addition to long division with dozens of difficulty levels and optional decimals or signed numbers.
www.primarypaths.org/

Numberline Lane
Teaching and learning math through stories. Numberline Lane is a series of ten math story books with colorful full-page illustrations. Written by a math teacher for children aged from 4 to 7 (preschool).  Price: $5.90/book
www.numberlinelane.co.uk/

Order of operations
Mystery picture game.
www.dositey.com/math/m/mystery2SMA.htm

Regrouping in vertical addition
Shows hundreds, tens, ones as pictures, and asks you to regroup if needed.
www.harcourtschool.com/justforkids/math/elab/samplepages/g3a02.htm

Bitesize Revision - Numbers
Has summary-type fact sheets/flash movies and little interactive test for understanding on several subjects: subtraction, addition, division, multiplication, fractions, number system, percentages, etc.   Very nice and appealing graphics.
www.bbc.co.uk/schools/ks2bitesize/maths/number.shtml

Decimal and whole number jeopardy
Review place value and comparing and rounding numbers. Also, practice number patterns.
www.quia.com/cb/8142.html

DotMath for kids
Associating dot patterns with numbers. Several pages of the book are available online (as images).
www.dotmath.tripod.com/

Online math tutors to help with math homework are available 24/7 at Tutor.com.

Practice of math facts

Mr. Martini's Classroom
Arithmetic interactive flash cards for the four basic operations, comparing, decimals, and more. Can choose scorekeeping on/off. Also has an interactivem long division tool.
www.thegreatmartinicompany.com/

A+ math games
Practice all four basic operations with math bingo (matho), hidden picture games, or concentration games.
www.aplusmath.com/games/

ArithmeTick
Solve math problems against the clock! Four difficulty levels, can tick or untick all four operations.
www.spacetime.us/arcade/play.php?game=1

Add 'em Up!
A strategy game that requires a quick recollection of basic addition facts. Remove the tiles from the game board as you add them up to a number from the stack.
www.spacetime.us/arcade/play.php?game=26

Online Math Flashcards
Addition, subtraction, and multiplication interactive online flashcards. A variety of number ranges, both timed and untimed versions.
wwwmathflashcardssoftware.info/.

Exuberant Eye games
Practice your basic facts with these kid-appealing simple games.
www.games.exuberanteye.com/

Math Magician games
Flashcard problems in all 4 operations.  Answer 20 questions in 1 minute.
www.oswego.org/ocsd-web/games/Mathmagician/cathymath.html

Go = Figure
A fun adding and subtracting card game for the whole family. Price: $5.95
www.nomadsgames.com/Product.php?source=Catagory.php&page=Product.php&image=gofigure&title=GO=Figure

Estimate addition quiz
Scroll down the page to find this quiz plus some others. Fast loading.
www.quiz-tree.com/Math_smain.html

Simple Kids Math
Online practice of the four operations.
www.simplekidsmath.com/

Math Skills trainer
A very nice set of timed games that practice basic facts of all four operations in a VARIETY of ways: fact families, missing addend/factor/divisor/etc., word problems, number words, number patterns.  Need to register first to use the games (free). 
www.skillstrainer.co.uk/

Sum Sense at Primary Games
Drag and drop the number cards to make 'sum' sense in this fun and challenging game (basic facts of division, multiplication, addition, or subtraction).  Scroll down the page to find the game.
www.primarygames.co.uk/

Addition and subtraction game from The Little Animals Activity Centre
Solve 1st grade level addition and subtraction problems by clicking on the ladybug with the right answer.
www.bbc.co.uk/schools/laac/numbers/chi.shtml

Cross the Swamp
Help Little Ron move from log to log across the swamp and practice multiplication/division or addition/subtraction.
www.bbc.co.uk/schools/starship/maths/crosstheswamp.shtml

Software

Calcul
Practice mental arithmetic and fraction operations. Pie chart shows the percentage of correct responses. Also play against a friend or set a time limit.
Price: Free
www.luziusschneider.com/CalculHome.htm

Home Help
Create printable math worksheets on different difficulty levels for addition, subtraction, multiplication, division, long division, percentages, or times tables.
Price: Free
www.tontin.co.uk/homehelp.htm

IronHead: MathFlash1.2
Freeware Math Flashcard Program for grades K-3 with multiple choice answer buttons. Drill all basic operations including division with remainder. Can set the program to repeat a fact that was answered wrong.  The range of numbers used is fairly small.
Price: Free
www.download.com/IronHead-MathFlash/3000-2053_4-7210015.html

Animated Arithmetic Shareware
Practice basic facts, column-form addition/subtraction, multiplication tables and corresponding division facts.  Progressive help is given with wrong answers.  The program is easy to use and appealing with little animations.  After completing the set of ten problems, the student gets to visit the game room with puzzles and mazes!
Price: $19
www.flixprod.com/arithmetic.html

7 Soft-Pak Programs
The Math Tri-Pak (Math Maker, Math Master, Math User) offers unlimited printable and companion on-screen activities and it culminates in 900 multi-level word problems. The Pak also has a Language Arts Master reading program with over 4000 words for spelling and reading, plus usage, writing mechanics, reading speed and comprehension, and basic grammar. The Test Pak allows you to add your own word lists for use in LA Master and to create True/False and Multiple Choice activities for any subject. The T/F Math Challenger is for mastering math facts.
Price: $4
www.vgernet.net/sbasics/

Math Facts NOW!
"Math Facts NOW!" is a simple yet very effective program that will identify weak areas in your child's knowledge of the times tables and basic facts of math, and drill in those specific areas, automatically giving increased drills in those areas. 
Price: $12.90  Money back guarantee.  See a review sent to us.
www.mathfactsnow.com/

Math Basics
consists of fifteen simple programs (including some games) that help teach addition, subtraction, multiplication, and division for whole numbers, fractions, and decimals including long division and column multiplication. Also has percents, basic probability, and word problems.  Several difficulty levels.
Price: $14.95, a free trial.
www.kidwaresoftware.com/

QuickFacts
Train and test the basic operations and facts with randomly assigned problems.  The software specially trains those facts the student has given wrong answer to until they are mastered.  Parent/teacher can administer tests and view progress charts.  Easy and appealing to use.
Price: $14.95  Free-to-try download at Download.com
www.endsightsoftware.com/

Math Skill Builders: Whole Number Arithmetic
A tool for learning and reviewing arithmetic skills.  Has a system for testing and placement at an appropriate skill level, detailed tutoring that explains how to solve problems, and practice solving an infinite number of randomly generated problems both at the computer, and with printed assignments. The program has 52 levels of difficulty, starting with basic facts, progressing through skills requiring regrouping (borrowing and carrying) and ending with complex long division. 
Price: Demo version free, full version $34.95
www.sssoftware.com/

Multiplication tables

Online Games

Megamaths tables
Explore the facts of each table, the patterns in each table, or check your skills in a timed nice game.
www.bbc.co.uk/education/megamaths/tables.html

Multiplication grid
Drag the scrambled answer tiles into the right places in the grid as fast as you can!
www.mathcats.com/microworlds/multiplication_grid.html

Multiplication.com Interactive Games
A bunch of online games just for the times tables.
www.multiplication.com/interactive_games.htm

The Times Tables at Resourceroom.net
Fill in the multiplication chart - partially or the whole thing - or take quizzes, and get graded.
www.resourceroom.net/Math/1timestables.asp

Explore the multiplication table
This applet visualizes multiplication as a rectangle.
www.mathcats.com/explore/multiplicationtable.html

Math Trainer - Multiplication
Multiplication table training online that responds to your answers and will train your weaknesses.
www.mathsisfun.com/games/math-trainer-multiply.html

Table Mountain
Climb the mountain with 20 questions from a selected table.
www.teachingtables.co.uk/tm/tmgame/tgame2.html

Math Mammoth Multiplication 1 Learn... - Multiplication concept - Times tables - Word problems Self-teaching worktext - download today!

Multiplication table Challenge
100 questions, timed.
www.programmingart.com/free/games/multiply/

Multiplication mystery
Drag the answer tiles to right places in the grid as they are given, and a picture is revealed
www.harcourtschool.com/activity/mult/mult.html

Mr. Taylor's Multiplication Facts Drill
Simple practice (click on the right answer) for the easy ones, the hard ones, the monsters, or them all.
www.geocities.com/multiplicationfacts

Multiplication memory game
Click on corresponding pairs (problem-answer).
www.dositey.com/addsub/memorymult.html

Quiz Hub - Multiplication game
Click on corresponding pairs (problem-answer).
quizhub.com/quiz/f-multiplication.cfm

Multiple counting practice
Click on the numbers on the grid to skip count.
www.hsuppappserv.com/multiplecounting/multiplecounting/

Times tables from BBC Skillswise
Has printable factsheets, online quizzes, two grid games, and five printable worksheets.
www.bbc.co.uk/skillswise/numbers/wholenumbers/multiplication/timestables/index.shtml

Math Dice Game for Addition and Multiplication
Instructions for three simple games with dice; one to learn multiplication concept, another to practice the times tables, and one more for addition facts.
www.teachingwithtlc.blogspot.com/2007/09/math-dice-games-for-addition-and.html

Books

Math Mammoth Multiplication 1
A self-teaching downloadable workbook. A systematic & logical method to learn multiplication concept and times tables. Emphasizes word problems, missing factors, learning to use the tables 'backwards', etc. Filling the 12x12 grid each time shows how little is left to study. Price: $4.
www.mathmammoth.com/multiplication_1.php

Times Tables the Fun Way: Book for Kids: A Picture Method of Learning the Multiplication Facts
A colorful and clever book of cartoons and stories. Children learn to associate the numbers with the characters in the story. Price (new): $19.95.
www.amazon.com

Times Tales
A mnemonic system - a memorable short story is associated with each fact. See also my review. Price: $14.95.
www.1shoppingcart.com/app/?af=410929

Numbers Juggling booklet
Times without the Tables. Explains mental math methods to multiply single-digit numbers without memorizing multiplication tables. Price: $14.95 / $9.95 (download)
www.mathmojo.com/order_materials/njtwt_details.html

Software (See also the programs listed above in the basic operations section)

Math Games Multiplication for Windows
A very simple program that quizzes a particular table, or mixed problems.
Price: Free for personal use.
www.quiz-tree.com/math-games-multiplication-windows.html

MathMatic
A simple program for learning and drilling multiplication tables and division facts.  You can also easily print out all the tables or create multiplication worksheets.  The "Junior" edition is free and fully functional with limited multipliers. The Student Edition by registration. Price: Free (Junior edition) / $23 (Student edition)
www.codexcel.com/sw/mathmatic/

Multi-digit Multiplication

Math Playground
Learn how to think algebraically with these clever weighing scales.
www.mathplayground.com/algebraic_reasoning.html

Thinking Blocks
Thinking Blocks is an engaging, interactive math tool that helps students learn how to solve multistep word problems. Scroll down to Multiplication and Division.
www.mathplayground.com/thinkingblocks.html

Rectangle Multiplication
An interactive tool that illustrate multiplying in parts using the area model. Choose the "common" option for multiplying in parts.
nlvm.usu.edu/en/nav/frames_asid_192_g_2_t_1.html

Math Mammoth Multiplication 2 Learn... - Multiply mentally - Multi-digit multiplication - Estimation - Problem solving A self-teaching worktext - download today!

Interactive Pan Balance
Each of the four shapes is assigned a certain weight. Place shapes on either side of the pan balance and figure out their relationships.
illuminations.nctm.org/ActivityDetail.aspx?ID=131

Division (incl. long division)

Mr. Martini's Classroom: Long Division
An interactive long division tool.
www.thegreatmartinicompany.com/longarithmetic/longdivision.html

Double-Division.org
Another form of long division algorithm - takes the guessing away from estimating how many times the divisor goes into what needs divided. Also called 1-2-4-8 division.
www.doubledivision.org/

The following games can be used to practice basic division facts, if the student hasn't mastered them.

A+ math games
Practice all four basic operations with math bingo (matho), hidden picture games, or concentration games.
www.aplusmath.com/games/

Math Magician games
Flashcard problems in all 4 operations. Answer 20 questions in 1 minute. http://www.oswego.org/ocsd-web/games/Mathmagician/cathymath.html
www.oswego.org/ocsd-web/games/Mathmagician/cathymath.html

Division Practice at AAAMath
Learn or practice basic division facts, and more.
www.aaastudy.com/div39hx3.htm

Cross the Swamp
Help Little Ron move from log to log across the swamp and practice multiplication/division or addition/subtraction.
www.bbc.co.uk/schools/starship/maths/crosstheswamp.shtml

Math Car Racing
Keep ahead of the computer car by thinking logically, and practice any of the four operations. http://www.funbrain.com/osa/index.html
www.funbrain.com/osa/index.html

Primary Games
A collection of games. The following links open the evaluation versions of some division-related games. The game collections themselves are sold at
www.primarygames.co.uk/

• Eggs on Legs
  www.primarygames.co.uk/PG5/Eggs/Div/eggsdiv.html
• DiviPods
  www.www.primarygames.co.uk/pg4/Divipods/divipods.html
• Division Divers
  www.primarygames.co.uk/pg3/ddivers/ddivers.html
• Sum Sense - Division
  www.primarygames.co.uk/pg2/sumsense/sumdiv.html

Factoring

Arrays and factors
Drag rectangles to show the factorizations of a given number.
wwwshodor.org/interactivate/activities/factors2/index.html.

Factor Game
A fun, interactive game where you practice divisibility among numbers 1-100. You can play against the computer or against a friend.
illuminations.nctm.org/ActivityDetail.aspx?ID=12

MathGoodies Interactive Factor Tree Game
Type in a missing number to the factor tree, and the program will find the other factor, and continue drawing the tree as needed.
www.mathgoodies.com/factors/factor_tree.asp

Snake
Eat factors, multiples, and prime numbers in this remake of the classic game.
www.spacetime.us/arcade/play.php?game=2

Friendly Tutor
Destroy the flying saucers by finding all the factors of a number. The site is under construction; click on the green 'start' button on the left on home page to enter the game.
www.thefriendlytutor.com/

Math Mammoth Multiplication Division 3 Learn... - Multiply & divide 4-digit numbers - Estimation - Divisibility - Factoring & primes Self-teaching worktext - download today!

Product game
For two players; each selects a factor, computer colors the product - who gets four in row wins.
illuminations.nctm.org/mathlets/product/index.html#pg

Place value/rounding

Tens and ones exercise
Enter the 2-digit number represented by ten-bags and one-balls.
www.dositey.com/addsub/tenoneex.htm

Math Mammoth Place Value 1 - forming ten-groups - filling the 100-chart - break numbers to tens & ones - comparing Self-teaching workbook. See samples!

Base 10 blocks applet
Drag 100-flats, 10-rods, and 1-squares into a working space to learn and practice through hands-on manipulation and visualization basic arithmetic (including multiplication as an area).  Has a complete lesson plan on how to teach place value and four basic operations.
arcytech.org/java/b10blocks/b10blocks.html

Place value puzzler
Place value or rounding game, click on asked place value in a number or type in asked rounding.
www.funbrain.com/tens/index.html

Arithmetic Workshop Place Values Tool
Drag models of ones, tens, hundreds, or thousands to the workarea, group them, break them up, or practice any of the four operations using the same visual models.
www.iknowthat.com

Maths Teacher's Toolkit
Includes place value calculator, place value cards, interactive number line, hundred square, and other interactive Flash resources.
www.crick.northants.sch.uk/Flash%20Studio/cfsmaths/Toolkit/Toolkit.htm

Place the Penguins
Practice breaking up the numbers into tens and ones, or into hundreds, tens and ones in this game.
www.bbc.co.uk/schools/starship/maths/placethepenguin.shtml

Can you say really big numbers?
Enter a really big number, try say it out loud, and see it written.
www.mathcats.com/explore/reallybignumbers.htm

Estimation
Exercises about rounding whole numbers and decimals, front-end estimation, estimating sums and differences.
www.aaamath.com/B/est.htm

Place value payoff
Match numbers written in standard form with numbers written in expanded form in this game.
www.quia.com/mc/279741.html

Naming Numbers
These pages teach number naming skills covered in K8 math courses. Each page has an explanation, interactive practice and challenge games about naming numbers.
www.aaamath.com/B/nam.htm

Megapenny project
Visualizes big numbers with pictures of pennies.
www.kokogiak.com/megapenny/default.asp

Powers of ten
Illustrates the dramatic changes of scale when zooming in or out is by powers of ten.
microcosm.web.cern.ch/Microcosm/P10/english/welcome.html

Cookie dough
Practice naming big numbers.
www.funbrain.com/numwords/index.html

Keep My place
Fill in the big numbers to this cross-number puzzle.
www.mathsyear2000.org/magnet/kaleidoscope2/Crossnumber/index.html

Hand made manipulatives
Print these pages on cardstock to get your own base 10 blocks, rods, geometrical shapes, or algebra tiles (XY-blocks).
mason.gmu.edu/~mmankus/Handson/manipulatives.htm

Place value puzzler
Place value or rounding game. Click on the asked place value in a number, or type in the rounded version of the number.
www.funbrain.com/tens/index.html

Maths Teacher's Toolkit
Includes place value calculator, place value cards, an interactive number line, a hundred square, and other interactive Flash resources.
www.crick.northants.sch.uk/Flash%20Studio/cfsmaths/Toolkit/Toolkit.htm

Estimation at AAA Math
Exercises about rounding whole numbers and decimals, front-end estimation, estimating sums and differences. Each page has an explanation, interactive practice, and games.
www.aaamath.com/B/est.htm