Disney features it's funschool website which has games, craft videos, and resources for parents and teachers.
Starfall.com is a reading website that has phonics, stories, songs and activities. It reads words that you click on so you don't have to be right next to your child reading to her.
Sesame Street has it's own interactive site that is full of games and other fun things.
and Scholastic's Magic School bus which includes games, stories, videos and printables.
You can always search for additional sites, but this will help get you started.