review of proper breathing

Congratulations, class! You are all currently alive, so you are masters of proper breathing.

breathing strategies to help reduce stress while wearing a mask

The main strategy is to continue breathing.

strategies to reduce heat production while wearing a mask

Assuming this isn't an engineering thermodynamics course, then I suspect about all you can do is try to stay cool and keep the air circulating just like you would in absolutely any other life situation.

mindfulness strategies to help navigate the daily changes occurring with COVID

Now we've got 10 minutes of meaningless psychobabble to pad the length of this training session to make it seem more legitimate.

concepts to manage the feelings of isolation

If my options are this course or feelings of isolation, then I'll take the latter.