Plenty of stuff here for all facets of the APUSH class.
These are files for each chapter in your AMSCO review book. Using these worksheets will help you understand the info more in depth.
Go to this page to dig deeper into each APUSH unit. There are links to videos, historical thinking skills, and timelines.
These are arranged by periods / units.
A former APUSH student, Fred Ayers, rewrote the entire textbook in his own words with outlines and vocab words. He currently attends Wesleyan and is a recovering insomniac.