There are a few things you could note about prefixes, roots and suffixes to make a stellar power point for your assignment.
First of all I would do a search on this website's documents just in case a teacher has already put something together that you might be able to gather ideas from, of course ultimately creating your own. Likewise, in the documents section, you might note that teachers have made handouts on word parts. They might be of value.
A few of the things I point out when teaching word parts include these:
- prefixes and suffixes both change meaning
- only suffixes change part of speech
- prefixes and suffixes are usually English language derived; roots are often from Latin/Greek
If you are doing a presentation that requires some action, you might consider a slide with a list of prefixes, roots and suffixes (without meanings). Have your audience make up crazy words.
On the next slide, provide definitions of the word parts and create meaning of the crazy words they made.