Fast and friendly. Best for simple definitions. When students select a gloss, information pops up in an alert box. Again, no links or graphics and alert box is sort of annoying. Can become confusing when students click in main window and it covers up the gloss window.
Students provide letter from right column which disappear if incorrect when verified.
Feedback is decent. Memory Answer question mult. Feedback pops up in text field. Nice, pretty simply script. The first is the prettiest version.