## Speed Grid Challenge - Subtraction - Levels 1, 2 and 3

You choose the time and the number of questions. Can you beat the clock?

## Speed Grid Challenge - Addition - Levels Two and Three

You choose the time and the number of questions. Can you beat the clock?

## Speed Grid Challenge - Addition

You choose the number of questions and the time. Can you beat the clock?

## Power Lines

Phase One
Put the power buttons in the correct circles so all lines of numbers add to the given number.
http://www.oswego.org/ocsd-web/games/Powerlines/powerlines1.html

Phase Two
Use the password from Phase One to continue the challenge!
http://www.oswego.org/ocsd-web/games/Powerlines/powerlines2.html

Phase Three
Use the password from Phase Two to complete the challenge!
http://www.oswego.org/ocsd-web/games/Powerlines/powerlines3.html

## Percentage Paint

A simple but effective idea, and nicely implemented!
Students can paint in a given percentage on a 100 grid.

Or a teacher could paint in a percentage and camera it to a page of an IWB document.
http://www.oswego.org/ocsd-web/games/PercentPaint/ppaint.html

## Ghost Evens and Ghost Odds

Ghost Evens
Click on the even numbers repeatedly to rack up your score.
http://www.oswego.org/ocsd-web/games/Ghostblasterseven/ghosteven.html

Ghost Odds
Click on the odd numbers repeatedly to rack up your score.
http://www.oswego.org/ocsd-web/games/GhostblastersOdd/ghostodd.html

Three thumbs up!

## Estimate!

Estimate the position of a given number on a number line. Levels 1 to 4 are whole numbers, while levels 5 to 8 are decimals.

http://www.oswego.org/ocsd-web/games/Estimate/estimate.html

## Give the Dog a Bone

Can you locate the 10 numbers on the 100-grid in less than one minute?

http://www.oswego.org/ocsd-web/games/DogBone/gamebone.html