Motivating students through multistamps in the Stamp Collection module (Moodle 1.9.15)

Hi! If you're using David Mudrak's excellent Stamp Collection module, then WELCOME! I'm happy to share with the Moodle world that I've managed to implement a multi-stamp deriviation of David's work. I found out how to do it without disturbing the underlying architecture of module's MySQL database. Now you can implement it for your own Moodle site.

Here's what the module looks like: