For helping a teen remove what has been learned, depending on the kid, I might offer them the book asking their views on the ideas presented... how solid they seem, how they might seem to apply to his school, etc (similar to asking us in a more open-ended way for questions for the author). The book has lots of sports stories, some bully stories, and some corporate stories from the news... which might spark interest in a teen.

Other than that, role modeling seems to be key. Especially re-framing "failure" as "not YET" and a valuable opportunity to learn.

Some key areas of the book, relevant to fostering a "growth" mindset may include:
Book page 32 - Mindsets Change the Meaning of Failure
Book page 39 - Mindsets Change the Meaning of Effort
Book chapter 7: Parents, Teachers, and Coaches: Where do mindsets come from?
Book chapter 8: Changing Mindsets (especially pages 234-236, Changing your child's mindset EXCEPT for the two sentences about homework)
Originally Posted by mindset book, page 236
For a long time, your son remains attracted to the fixed mindset... Yet as the value system in the family shifts toward the growth mindset, he wants to be a player... first he talks the talk... then he walks the walk... Finally... he becomes the mindset watchdog. When anyone in the family slips into fixed-mindset thinking, he delights in catching them.