DTD, an addictive web-based game reminiscent or Warcraft 1 thru 3, allows you to submit your high scores to a group as well as have them count individually.
If you decide to play at Medium or higher (The Easy setting won't record scores) I suggest you have your scores listed in the "edugamerz" group.
Make sure you get the spelling right, though - if you spell it without the "Z" it'll just go to a different group. I found this out the hard way.