Reading for growth.
A growth mindset can be a difficult thing for young people to wrap their heads around. It's helpful to provide them examples from your life when you learned something new after having struggled through it, only to come out on the other side with a new skill and a better understanding of yourself in the process.
Back-to-school is right around the corner! Try having a one-on-one book club where you switch off monthly picking a book to read from a list. This list of books for middle school children is a great collection of reads that shows young people growth mindset in the main characters as another way to help them see the potential in themselves.