http://www.turtlediary.com A great website for learning games and activities
http://www.scholastic.com A great website with a lot of information. I especially like the Book Wizard to find out reading levels for many book titles.
http://www.pbskids.org A lot of games and videos for beginning readers
https://www.readingrockets.org A great resource to learn more about how children learn to read.
http://www.hubbardscupboard.org/ A wonderful resource for early literacy and printable books (great for Pre-K and Kindergarten!)
https://www.readinga-z.com/ They are offering a free 14 day trial right now.
This is an excellent list of reading websites! There are resources for all ages, so please be sure to scroll all the way through!
Another excellent resource for readers of all ages.