Sites: Grades 3 – 5

Math Arcade
A collection of brain teasers, puzzles, riddles, games and optical illusions.
http://www.brainbashers.com/
 
Riddles
http://www.figurethis.org/challenges/toc.htm
 

Riddles, Puzzles

http://www.puzzability.com/puzzles/index.shtml

Teach students the multiplication tables

http://multiplication.com/

Math Games to Practice Math

http://www.funbrain.com/

Site was developed to help students improve their math skills interactively

(flashcards)

http://aplusmath.com/

Properties

http://www.321know.com/mul74bx2.htm

Games online to play with! ~tangrams/

www.pbskids.org/sagwa/games/
        

Online Games

http://www.counton.org/games/
http://www.coolmath.com/
 
Math puzzles, Problem of the Week, Library
http://mathforum.org/k12/k12puzzles/critical.thinking/index.html-problems
 

Practice computations

http://www.superkids.com/aweb/tools/math/
http://www.math.com
 
Fraction manipulatives:
explore fractions with movable pieces 
 
fraction circles with movable pieces
 
fraction strips with movable pieces

Challenges

http://mathschallenge.net/index.php?section=problems
http://www.multiplication.com/interactive_games.htm
~http://www.aplusmath.com/Games/index.html