Here are tips for how to Search on Google.
Google pages for advanced search, videos, and images are linked below:
Although the guide linked below does not contain the academic sources that you will need for your presentation, it is a great source for your own general background and information. The "Historical Timelines" might be especially helpful.
Think carefully about the sources you are finding and using. Here are some tools that can help:
Currency - How recent is the information?
Reliability - What kind of information is included in the resource? Is it balanced? Does the creator provide references or sources for data or quotations?
Authority - Who is the creator or author? Who is the publisher or sponsor? What is the author's or publisher's interest (if any) in this information?
Accuracy - Is the content readable? Is the content truthful? Is the content correct?