Starfall- an awesome website for phonics and reading practice starfall.com
National Geographic for Kids http://www.nationalgeographic.com/kids/
PBS Kids http://pbskids.org/
Literacy games- Some very good games working on a variety of literacy skills. The blue games are the beginner games. The other ones are too difficult for beginning kindergarteners! The Paw Park Alphabet Bears is also fairly difficult even though it is supposedly on the beginner level. http://www.earobics.com/gamegoo/gooey.html
Houghton Mifflin math games which go along with the skills taught in Kindergarten math. http://www.eduplace.com