Starfall: Learn the alphabet, letter sounds, and sight words.
Tumble Books: Log in to your public library to access free online books.
Sumdog: All sorts of fun free math challenges. Teachers will have to create logins for kids.
Khan Academy: Khan Academy offers practice exercises, instructional videos, that empower learners to study at their own pace. It tackles math, science, computer programming, history, art history, economics, and more. Teachers/parents will have to create a free account for the students/children.
Hour of Code: Free online resource to teach kids how to use codes to program.