Kids can always use some extra help with mathematics. From fractions to basic math facts; problem solving to number sense; geometry to algebra, there is always room for improvements. Here are 46 sure-fire sites that will engage, enlighten, educate and Einsteinify your students. Most of the sites listed below are geared towards students in grades 1-6.

Fractions

• Gamequarium
  40 separate fractions games here.  
• Math Fractions
  Lots of games and activities here.
• FunBrain
  Soccer Shootout and more.
• Visual Fractions
  Help Grammy and Grampy learn fractions.
• Home School Math
  You don’t have to be home-schooled to enjoy this site.
• Jamit
  Fun interactive games.
• FunSchool
  Action Fractions and links to other fun learning games.
• Fraction Monkeys
  Hang the fraction monkey on the correct place in a number line. Great site for IWBs.
• Pizza Party
  Figure out how Much Pizza is Left.
• Equivalent Fractions
  Help Melvin make a match with equivalent fractions.  
• Fresh-Baked Fractions
  Help Jackson complete his pie by identifying equivalent fractions that do not match.  
• The Problem Site
  Concentration Game for 1 or 2 players.
• Equivalent Fractions   
  Matching Game. Good to use with IWBs.

Basic Math Facts

• Multiplication.com
  Really cool games to help you master your math facts. 
• Number Lines
  Work on your addition mastery by shooting number balls that add up to a specific number.
• The Math Page
  This is a really great site from Manhattan Community College 
• A+ Math
  This site is great fun for third graders and up.
• Math Dictionary for Kids
  Great math dictionary for kids.
• DiscoverySchool.com Worksheet Maker
  A super way to make math worksheets. Try it! 
• Aunty Math
  Aunty Math presents math challenges that encourage thinking skills for students in grades K-5. 
• Cool Math
  Cool Math is “designed for the pure enjoyment of mathematics.” This interactive site features games, puzzles, calculators, and lesson plans. 
• Harcourt Animated Math Glossary
  This is a complete online dictionary of math terms. 
• Math.com
  Math.com: The World of Math Online is chock full of everything to do with math from the most basic to advanced topics. It includes homework help, calculators, games, practice, and much more. 
• Teach R Kids Math
  I dislike educational sites that misspell words on purpose (in this case, r instead of our) to look cute. However, this site provides online interactive math practice that covers a range of topics from simple to advanced for elementary school children. 
• AAA Math
  Hundreds of pages of basic math skills to more advanced challenges.
• BBC Math
  Math game wheel.
• Multiplication Mystery   
  Drag numbers into the multiplication grid.
• Fun Brain
  Multiplication Baseball
• Multiplication
  Multiplication Speed Grid Challenge. Fun game where you race against the clock to complete multiplication problems.
• Powerlines
  Cool game – students arrange numbers in lines that have to add up to a certain number. Harder than it sounds.
• Practice Fish
  Help Jungle Jim catch fish by solving multiplication problems. Good for IWBs.
• Math is Fun
  Assorted math puzzles and quizzes.
• Mrs. Glosser’s Math Goodies 
  Math Goodies is a free math help portal featuring in-depth lessons, worksheets, and homework help. A pioneer of online help, this site has been reviewed on television and in other media. Math Goodies has hundreds of resources for students, educators and parents.

Miscellaneous Math

• Graphing
  Create-a-Graph
• Clocks – Teaching Time
  This resource, produced by the Franklin Institute Online Fellows, takes an educational look at timepieces in the collection of the Franklin Institute Science Museum 
• Polygon Playground
  All about polygons!
• Builder Ted
  Number line – help Builder Ted fix the roof by putting decimals in order on his ladder.
• BBC Maths File Game Wheel
  12 games here categorized by: Shape Space & Measure, Algebra, Number, and Data Handling.
• Magic Squares
  Lots of links to magic square games and activities.
• More Magic Squares
• Yet even more magic squares
• Allmath
  The last magic square site here.
• Math Cats
  Explore the Polygon Playground to explore symmetry, make tessellations and pictures. Good for IWBs.
• Math in Everyday Life
  When you have a student ask, “When am I ever gonna use this?” You can direct them to this site.
• Math Stories
  The goal of this math website is to help elementary school (Grade 1st through 6th) children boost their math problem solving and critical-thinking skills. MathStories.com has over 15,000 online and printable NCTM compliant math word problems for children to enjoy. Word problems are available in both English and Spanish.
• Prongo.com
  Prongo.com is an educational website for Kids. We offer fun, interactive, and educational games for kids. For teachers, Prongo.com also offers Quizstation. Quizstation allows teachers to create online quizzes for their students.

Got others? Share below.