http://fp.el-tejon.k12.ca.us/smart-sites

Typing:

 https://www.typingclub.com/

Music:

http://www.incredibox.com/

Reading & Language Arts Games:

http://www.starfall.com/

http://www.abcya.com/

Academic Games:

http://www.arcademics.com/games

Math Games:

http://www.mathplayground.com/games.html

Science Games:

https://switchzoo.com/

https://kids.nationalgeographic.com/