I was expecting something a lot harder, like;

Name every single president:

Name the 4th president in the US:

Name the 9 people who signed on the (don't know what it's called) Independence bill:

Name all of the amendments:

Who found [not founded!] the US?

Who were the first settlers?

Aside from Britain, name four other countries who had people who emigrated to the US:

Which countries fought for power in the US?

Name three neighbouring countries:

Why was the hoover dam built?

Which president was in power during WWI?

Name two American inventions:

etc etc