Starfall - A wonderful website dedicated to learning sounds and to read http://www.starfall.com
Lots of interactive games for kindergarten http://faculty.usiouxfalls.edu/arpeterson/kindergarten%20smartboard%20sites.htm
Fun Brain http://www.funbrain.com/
Sesame Street http://www.sesameworkshop.org/sesamestreet/
National Geographic Kids http://www.nationalgeographic.com/kids/
Macon County Schools http://www.maconcountyschools.com