Brightstorm (you need to create a free account in order to use it)
Free Rice (Freerice has 2 goals: provide education to everyone for free & end world hunger)
Free-ed.net (the free virtual university)
iCivics (resources & tools to support civic learning)
Khan Academy (math tutorial videos)
Newsela (current events aricles with Lexile level options)
Username and password required for remote access. Ask your librarian.