Here are some of the free sites for teachers and parents.

Misc:
http://www.classicshorts.com/
http://www.apples4theteacher.com/
http://www.seussville.com/university/
http://www.storylineonline.net/
http://www.marcopolo-education.org/home.aspx

cue cards: http://www.download.com/3000-2051-10075304.html?part=88333&subj=dlpage&tag=button/

grid / graph paper: http://dotolearn.com/activities/mathhelpers/index.htm

flash cards: http://www.flashcardmachine.com/
http://www.studystack.com/

Math stuff http://www.k111.k12.il.us/king/math.htm#Geometry/
http://www.mathscore.com/math/free/worksheets/freeMathWorksheetGenerators.html

History (5th grade w/ History Alive) http://tutorial.teachtci.com/