Elementary Vocabulary Games - for grades K-2
Games and Activities - various games and activities for all grades, includes such things as Construct-A-Word, comic creator, Factor Game, ABC Match, etc.
Interactive ELA Games - activities and games related to ELA concepts for elementary
Interactive Games - unique site, no instructions, just click on pictures and get started
Interactive Math Games - games for elementary, games for place value, basic math facts, tangrams, angles, symmetry, fractions, decimals, percentages, measure skills, probability, etc.
Interactive Science Games - games for many science topics, applicable for elementary and middle school, possibly applicable for basic levels of information for secondary sciences
Interactive Whiteboard Games (elementary) - games for various subject areas from PBS
PowerUp - free, online, multiplayer game for science and math that allows students to experience the excitement and the diversity of modern engineering while saving the planet
Quiz Buzzer - simple interactive set of quiz buzzers
Review Games from Oswego - pre-made games and make own games
SMART Notebook Game Templates - various game templates for different grades and subjects built within the Notebook Software
SMART Notebook Jeopardy - template for SMART Notebook