Sites to watch amazing lessons on video:
Ted Ed - Free videos of lessons from colleges, high schools, and more from the Ted Talk site.
Khan Academy - Free instructional videos on thousands of subjects.
Youtube EDU - Free educational videos from teachers.
Stanford University - Videorecordings of real Stanford professors and courses.
PBS - The Youtube channel for PBS videos.
Numberphile - Free math lessons and videos.
Steve Spangler's Sick Science - free science lessons and videos.
Homework Help:
Quizlet - Free online flashcards - create your own or use others
BJ Pinchbeck's Homework Helper - Online homework helper
Scholastic's Homework Hub - Research links, study tips, and tons more