A student can use their fingers to write on the page and if there is a mistake, its easy to erase and redo it. Each of these pages can be used in different ways. I took a few shots of some of the blanks and I can see a variety of ways to use them.

This is the 5 large rectangles page. It could easily be used to write down the correct order for solving an equation based on something shown on the board, or perhaps as a way to compare fractions, decimals?

This particular page is good for showing the angles associated with two parallel lines and a transverse.

The blanks can be used in most high school math classes from Pre-Algebra up to Algebra II in a variety of ways. In addition this app could be used in the upper elementary and middle school classes. I plan to put this one on the iPads come fall because of the possible uses. Check it out and the best thing about it? Its free.