MATH

Busy Bees

http://www.hbschool.com/activity/busy_bees/index.html

Simple math applications for addition and subtraction.
Web Math

http://webmath.com/

Website that generates answers to specific math problems. 
Great Homework Helper!!
Algebra Help

http://algebrahelp.com/

Contains lessons, calculators, worksheets, etc. to help with Algebra
A Maths Dictionary for Kids

http://www.amathsdictionaryforkids.com/dictionary.html
Math is Fun

http://www.mathsisfun.com/definitions/index.html

An illustrated math dictionary
Explore Learning

http://www.explorelearning.com/

450 online simulations for grades 3-12
Illuminations

http://illuminations.nctm.org/

Lessons and Activities linked to National Mathematics Standards
Class Brain

http://www.classbrain.com/artgames/publish/math_games.html

Variety of math games from place value to finding coordinates.
Cool Math 4 Kids

http://www.coolmath4kids.com/

Interactive games to support math skills.
Create A Graph

http://nces.ed.gov/nceskids/createagraph/default.aspx

Online resource for creating various graphs (bar, pie, XY, line and area).
Fun Brain

http://www.funbrain.com 

Interactive games for early learners of math and language arts.
Illuminations

http://illuminations.nctm.org/

101 Online activities for teaching math concepts.
Interactives

http://www.learner.org/interactives/

Cross-curricular online activities in a variety of subject areas, grades 2 – 12.
Johnnie’s Math Page

http://jmathpage.com/

A link to interactive math tools and activities
Khan Academy

http://www.khanacademy.org 

Uses videos to provide math and science lessons to all ages. 
Kids Bank

http://www.kidsbank.com/

Tutorial website that explains the concept of banking to children.

Kitzu

www.kitzu.com

Digital learning kits for grades K – 12 in all subject areas.
 
Math Playground

http://www.mathplayground.com 

A fun site for elementary and middle school students to practice their math skills.
 
Multiplication.com

http://multiplication.com/

Games, activities and teacher resources for teaching multiplication facts.
 
Schooltime Games

http://schooltimegames.com/index.html

Variety of online games to supplement instruction in various subjects.
 
Unit Conversion

http://ultimateunitconverter.com/

Type in any unit of measurement and it will calculate a bunch of conversions.