Whenever you want to reinforce accent knowledge, you can ask students to respond to questioning with actions.
I use acute / grave accent with slanted arms (
often inevitabley with accompanying shouting of the accent name/sound), circumflex (two hands), and even umlauts (two punches forwards).
You can easily turn this into a game by seeing who gets the accents wrong/right.
Helps with accuracy in writing, and can also help pronunciation (at least for e acute in French!)