Free FITS Image viewer & editor software
Improve Math skills with Math Ninja game
5 ways to download & save Wikipedia articles offline
Check if number is prime & see Factors of non-prime number
Solve Math integration problems online at Wolfram
Periodic Table elements on computer [chemistry]
Improve Vocabulary online [useful fun learning]
Google Internet Bus teaching internet in motion
Download or Order free Microsoft inspired posters
Download ‘Wikipedia for Schools’ for Offline viewing