Here’s an excellent alternative to the same old static Power Point slides. Prezi is FREE to educators (who sign up with their school email acocunt) and allows non-linear presentations. Take a look at some of their sample “Prezis”, especially “Math is non-linear, so why do we teach it that way?” While you must create the presentation online, you can always type out your text, etc., and copy-and-paste it into the editor. The neat part is that you can publish your Prezi and embed it into a blog or website very easily, allowing for simple and easy sharing with your students who have Internet access at home. Prezi - The zooming presentation editor
BTW: There is a new way to create non-linear presentations within Power Point 2007. It’s a plug-in called pptPlex. This Power Point plug-in allows for non-linear or non-sequential presentations, as well as "zoom-able" slides. This plug-in lets you "jump around" and "drill into" a presentation to allow more flexible sharing of knowledge, all from your desktop. I’ve experimented with this and I have found that it is very easy to use, especially if you’re already familiar with Power Point.
Either of these two tools would be an excellent way to present visual information in a non-linear format. Might be worth a try!