California State Standards:  http://www.cde.ca.gov/be/st/ss/  

Language Arts:  

• http://www.starfall.com/
• http://www.funbrain.com/
• http://readwritethink.org/student_mat/index.asp
• http://www.ed2netlearning.com/

Mathematics:  

• http://sourceforge.net/projects/tuxmath
• http://sourceforge.net/projects/tuxmathscrabble/
• http://www.ed2netlearning.com/
• http://www.pearsonsuccessnet.com

Keyboarding:  http://sourceforge.net/projects/tuxtype  

Information Literacy: www.worldbookonline.com (username: trusd / password: trusd)