In this episode Krista and Sandrine talk about activities that they do with their students outside of the classroom, the benefits of such activities and how students react to such activities. 

At the beginning of the episode they reference back to the proficiency unit they do in their classes. If you are curious about what they're talking about, episode 18 is about the reorganization of that unit.

the books referenced in the aha moment segment are...

While we're on the topic by Bill VanPatten

The subtle art of not giving a f*ck by Mark Manson