Karl decides to quit piano lessons when he's 12, because his new teacher is too strict. But then she says something that changes his mind, and transforms their relationship.

Do you have your own story of an unsung hero? We'd love to hear it! Record a voice memo and email it to us at [email protected].

Some guidance:

--Focus on ONE moment that you will never forget.

--Make sure you're in a quiet, non-echoey room.

--Speak conversationally, like you're talking to a friend.

--Let us know why this person continues to impact your life.

--If your hero were standing front of you today, what would you say? Address them directly.

-- Here are some tips on how to make a great recording on your phone.

Thank you!