One option is to find general texts on public speaking - either in print or ebooks.
Think about the type of informative speech you want to give. This can be "about" something, a person, place, event, etc. You could think about concepts as well.
Biographical information on approximately half a million people, from antiquity to the present.
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"a minimum of 3 sources. Dictionaries, Encyclopedias, Wikipedia.com and personal interviews DO NOT count as sources for the minimum requirements..."
what do you define as a good quality source?
Begining until 9:00
How does he establish himself as a speaker?
What do you like or not about him as a speaker?
What parts are factual/ informative? What parts are persuasive?
What specifics do you hear in this clip?
What visuals does he use? What do you think about them?
Name one person you know that's a great speaker.
So where do you go to find great speakers or listen to great speeches?
Cicero (106-43BC) was a great speaker, but recordings of him are difficult to obtain.
A few places you can look: