1. Powerlines (Level 1):  Make sure that all of the numbers in all of the lines add up to the target number.  After you finish level one, click here for level 2, and here for level three (you need a password from level 1 to go to level 2 - same for 2 to 3)
2. Shuttle Launch:  Answer math questions to launch the shuttle to its destination.  Choose either addition or subtraction at a level that will challenge you!
3. Mummy Number Line:  Answer the questions to unwrap the mummy.  Change the challenge on the top of the screen.