These are websites that I have found that I think are great learning sites for first graders.
First Grade Math Fun Math Games (IXL.com)
A great site for learning to read. Starfall
Stories and rhymes for 1st graders. CBeebies
Build a character, then write about your character. Characters
Learn to read and write with Clifford (Scholastic) CLifford, the Big Red Dog
Match the picture to the sound. Picture Match
Have fun learning to spell. (Harcourt Brace) Spelling Activities
Combine letters to build words. Word Builder
Put the alphabet back in order. ABCya
Learning Language Arts can be fun. Kid Port
Story Line
A great site to help with building words. Dibels Interventions
Learning Games Julia's Rainbow Corner
Game Goo; Learning that Sticks.