Storyline Online is a site sponsored by the Screen Actors' Guild. There are picture books read aloud (with the illustrations), and activities that coordinate with the books. See Stellaluna at http://www.storylineonline.net/index2.html Very good reading of it (with the pictures). http://www.whitehouse.gov/kids/whlife/index.html
(Sample link) National Geographic for Kids http://www.nationalgeographic.com/kids/
Phonics and reading starfall.com
Math games http://coolmath-games.com