Here are a load of IWB Maths Warm ups. They are used to get your students brains warmed up to doing maths.
Some of these are mine but others have come from http://www.kented.org.uk/

Download SmartViewer if you are non SmartBoard user. 

 Download Note: You may notice that these files try to save as .ZIP, change this to .notebook

Bowl a Fact.notebook

Dice maths Starters.notebook

All Square

Bus Routes

Card Sharp

Make 5 Numbers

Make 200

Maze

Money Bags

Card Tricks

Circle Sums

Neighbours

Next Door Numbers

Number Joins

Odds and Evens

Rows of Coins

Sum Up