Best overall sites to study for AP test!
AP Gilderlehrman for AP US History Khan Academy for AP US History
Google Drive for topics lists:
(previous classes) hand-written lists (former student) Ingela's timeline
list of events Supreme Court cases to know
Try these sites, too:
short answer questions overall review, videos, etc.
LE and DBQ College Board (official website of the AP tests)
Released Prompts Review of former text (13th ed.)
videos
The Century: America's Time for 20th century
Crash Course USH videos (remember, decrease the speed to 75% in settings...)
Adam Norris videos (Textbook driven)
Adam Norris videos (Topic driven)