Starfall: Learn to Read with Phonics, Learn Mathematics
Free site to teach the basics of reading. Features interactive books and phonics games.

Online guided reading program with interactive ebooks, downloadable books, and reading quizzes.
Teacher name: mpodkowka 

ABCya! | Educational Computer Games and Apps for Kids
Online games for kids in K-5 sorted by grade level. Games incorporate areas such as math and language arts while introducing basic computer skills.  All of the best K-5 online, interactive, educational games and simulations in one place!

Math explained in easy language, plus puzzles, games, worksheets and an illustrated dictionary. For K-12 kids, teachers and parents. This has math games that self corrects students as they play and it has printable worksheets too! 

PebbleGo by Capstone
How PebbleGo Works With just one simple username and password for your entire school, signing in for even your youngest students is a snap.
Login: gravely
Password: school