Red text is often hard to read. All caps look like you're shouting. Include a good combination of words, pictures, and graphics. A variety keeps the presentation interesting. Display information by Progressive Building.
Students respond well to gradually adding information.
Incorporate audio into computer presentations. Most rooms have inputs for computer audio. Incorporate sound effects or audio clips into presentations. Try not to rely on the Internet. If you are displaying web pages, download them before class and save them to disk.