Hot Potatoes and Google

You can't load Hot Potatoe files into Google docs, or google sites, but you CAN access them via DropBox.

Put the files in DropBox public folder and then, in Google sites, you 'edit' + 'insert' + 'more gadgets' + 'iframe' + address of the file in DropBox.

This way you visualise the exercise within the site (or wiki or blog). And as it is self-correct, there is no need to have it in the Moodle.