(Sample link) White House for Kids http://www.whitehouse.gov/kids/whlife/index.html
(Sample link) National Geographic for Kids http://www.nationalgeographic.com/kids/
ABC Teach--Kindergarten activities http://www.abcteach.com/
Ed Helper.com--activities for all grades http://www.edhelper.com/
First School--Preschool and Kindergarten activities http://www.first-school.ws/
Amazing Incredible Handwriting Worksheet Maker http://www.handwritingworksheets.com
Starfall.com-Reading activities http://www.starfall.com