1st Grade

Logic Zoo is a game that requires the player to put “animals” into the appropriate sections of a “zoo” based on what they look like — short ears, long ears, etc.
Learning Chocolate is a very good interactive vocabulary site for beginning readers. The site is divided into categories, provides audio support for the text, and has numerous re-enforcing online games.

Max's Math Adventuresis from Scholastic, and offers a variety of relatively simple math games.