To help you with your topic presentation have a look at this useful language:
Un consiglio nella scelta dell'argomento.. go for something YOU really enjoy investigating and like to talk about.
You need to use accessible and easily-understood words rather than technical or obscure words.
Try to avoid long sentences. Short sentences are much better.
Use mind maps to help you organize your thoughts,or cue cards as well as power point presentations or photos to support your work.