National Geographic Kids

http://kids.nationalgeographic.com/

 

PBS Kids

http://pbskids.org/

 

Discovery Kids

http://store.discovery.com/?AID=11732244&PID=4003003&SID=is0clxbnbe011r7e007q4&URL=http%3A%2F%2Fkids.discovery.com%2F&ecid=PCID-2470763&pa=affcj&PCID=2470763

 

Wonderopolis

http://wonderopolis.org/

 

ABCya!

http://www.abcya.com/fourth_grade_computers.htm

 

Typing Games

http://onlinetypinggames.org/

 

Vocabulary Spelling City

http://www.spellingcity.com/

 

Kahn Academy (Math)

https://www.khanacademy.org/math/cc-fourth-grade-math