AGIS' math links facts and problem solving practice, as well as fun games and more! http://www.avongrove.org/agis/Teachers/ksherman/mathindex.html
Connected math projects http://connectedmath.msu.edu/CD/Grade6/index.html
Fraction games http://www.jamit.com.au/fraction-games.htm
Do you need to practice your rote skills? You can print flash cards at http://www.flashcardmath.com/flashcards/flashcards.htm
MathMastery's CyberChallenge gives you one minute to practice addition, subtraction, multiplication, or division problems. This can be noisy, so please turn down the volume on your computer. http://www.mathmastery.com/cyberchallenge/
Use the worksheet creater at SuperKids to ceate your own practice pages to print and use. http://www.superkids.com/aweb/tools/math/index.shtml
The NCES Kids Zone provides information to help you learn about schools; decide on a college; find a public library; engage in several games, quizzes and skill building about math, probability, graphing, and mathematicians; and to learn many interesting facts about education. http://nces.ed.gov/nceskids/index.asp
Mrs. McKeon's webpage links many educational and fun sites about Pi. http://www.avongrove.org/agis/Teachers/PMckeon/Pidaywebsites.htm
Egyptian Fractions http://www.mcs.surrey.ac.uk/Personal/R.Knott/Fractions/egyptian.html
Compass Learning http://www.compasslearningodyssey.com
IKnowThat.com has many fun and educational activities for 6th grade math concepts. http://www.iknowthat.com/com/GradeLevel?GradeLevel=6&Subject=Math
Play set online at http://www.setgame.com/set/puzzle_frame.htm
Play set online at http://2n1.org/applets/set/
King's list of online math activities includes fun and educational links relating to various units. http://www.k111.k12.il.us/king/math.htm
The National Library of Virtual Manipulatives for Interactive Mathematics http://nlvm.usu.edu/en/nav/vlibrary.html
Improper fraction and mixed numbers game link http://www.jamit.com.au/htmlFolder/app1003.html
Yahtzee online http://www.geocities.com/masterofallhesurveys/games/yahtzee/index.html
Let's make a deal http://www.stat.sc.edu/~west/javahtml/LetsMakeaDeal.html
Mission: Integers Mission 2 http://www.math.com/school/subject1/lessons/S1U1L11GL.html
Mission 3 http://www.aaamath.com/g76-add-3-negative.html