Remember to include bibliography, webgraphy and to use images labeled for reuse.
You can include a clip… (in English!)
Do not copy paste from the Internet. Use your own words.
Try searching for information on different sites. Simple English Wikipedia can be better than Wikipedia in English.
Do not fill your slides with too much text, just facts and figures and key words. You can use index cards to remember what you want to explain.
When delivering the presentation, feel confident, make eye contact with your audience and smile at them, be sure to have inflection in your voice so that you engage listeners, use hand motions and beware of your body language.
Don’t forget to include a table of contents at the beginning.