All teachers should know and apply the concept of a growth mindset (this opposed to a fixed mindset). The concept is fairly common among teachers, simple to grasp, and truly can be life changing if effectively applied and integrated.
I thought I sufficiently understood and applied the concept. However, I decided to read the whole book, Mindset by Carol Dweck, for some research I’m doing and gained a lot more by doing so. Yes, the concept is simple, straightforward, and easy to grasp, but the book includes many examples that illustrate different concepts, many of which really helped deepen my concept of what fixed vs. growth mindset can look like in different settings. It was enlightening!
This is a concept that is broadly applicable to all humans, not just teachers and (active) learners. (Hopefully we all never stop learning.