Activity
Scholastic

Scholastic: Math Maven's Mysteries: Mystery at the Third Strike Sports Store

For Teachers 3rd - 5th
Solve a mystery using your reasoning skills. At this site use all the clues and figure out the winner of the Third Strike Contest.
Website
US Department of Education

Helping Your Child Learn Math: Math at the Grocery Store

For Students Pre-K - 1st
Make grocery shopping a mathematical experience. Parents and children explore a variety of math concepts through this collection of engaging math activities. Lesson are presented in varying levels of difficulty, offer "Parent Pointers"...
Interactive
Math Slice

Math Slice: Math Memory Game

For Students 1st - 5th
You have just 10 seconds to memorize the 7 to 10 numbers that flash before you. If you correctly identify all numbers, then you're a winner. A fast paced, interactive game that requires good memory skills. Responses verified immediately.
Interactive
Math Playground

Math Playground: Tangrams

For Students Pre-K - 1st Standards
Click on the tangram frame to start. Use the white tangram pieces to make the picture shown on the upper right.
Activity
University of Cambridge

University of Cambridge: Nrich: Seven Pots of Plants

For Students 3rd - 8th
On this one page website sharpen your logic skills while working on this flower pot labels mix up challenge. The solution is available to double check your solution.