For example, if you bring in a printout of text, BCU can make a slide with yellow text on a blue background, or white text on top of a picture of campus, etc. BCU has a catalogue of colors you can choose from. Just remember only one color can be burned onto a background. The process has a few extra steps to it. If you want a picture as a background we'll have to duplicate it and make a negative of the text.
Transparencies are another common easily accessible visual aid.
You may also find the overhead inconvenient because they are loud and the bright light makes it difficult for some people to read. However, it offers a cheap and immediate solution to visual aid needs. You can hand write your text and pictures using an overhead pen. This may look unprofessional, but gives immediate, cheap results. Pens and blank transparencies are sold at the Student BookStore.