Find literature at the library. Remember that we have a school library on KG with attached librarian who can help you with the search. You will mainly base your IA on printed literature, ie books, and only secondarily on material from the web. You will
typically need three to four books and sources. Be critical! Not everything that you think is good, is reliable and suitable. You will typically use material that is written for secondary education, but it's fine if you also use more "academic" literature.
Avoid school books. Avoid literature by authors who are not professional historians.