There are loads of great Interactive Whiteboard resources and worksheets you can use completely free.
To access the free resources all you need to do is register with Learning Clip. Then, once you're logged in use the free resources as often as you like and print as many of the free worksheets as you want.
Even if the resources you want aren't free you can still preview them as often as you want.
Not Ready To Register? Try these totally free Sample Resources