If your professor allows you to use the Public Web, try using search engines to find the information you need.
Keep in mind, there is no perfect search engine. Even the largest search engine can lead you to only part of the Public Web.
Already have a favorite search engine? Be aware that different search engines may scan different parts of the Public Web. So, if you only use your favorite search engine, you could miss out on over 85% of the information available on the Web.