Lesson menu - marking user has completed topic upon returning

I have a lesson menu with three topics.  User clicks on first topic, completes all the screens(most importantly last one) and returns to lesson menu.  Is there a way I can mark for the user they've completed that topic?  Would that be some type of layer (with a checkmark, perhaps, or another visual device) with a condition on it that carries over from the last screen?  Basically, a way for the user to see their progress through a lesson via topics checked off on the menu?

Am I making this too difficult?   Any help is much appreciated!