Free Online Learning Games. No downloads required.

Mangomon is an educational website that offers high interest online curriculum for a fee. They also provide some online learning games  as a free resource. No downloads or installations are required.

Online Games

Catch a Fish!   Sight words
Balloon Pop!  Create new words adding prefixes and suffixes to words
Match 'em Up!  Homophones
Word Rockets!  Consonant digraphs
Power Up!  High Frequency words
Shape Trails! Transformations in math
Sleeboz Stampede!  Math facts
Space Rocks!  Math factors
Tire Jumping!  Adding and subtracting

The website also offers several additiona free resources including
Vocational and Occupational Flashcards.