(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/
Fun, extra practice activities http://teacher.scholastic.com/activities/CLF/index.htm?grade=grdk2&subject=allSubjects
This is a fun way to learn how to type! http://www.bbc.co.uk/schools/typing/