Also on these boards
(I've heard this story before but love the pic with it) Following graduation a father handed his daughter a bag with a copy of "Oh the Places You'll Go," by Dr Seuss in it. On the first page she saw a short paragraph written by her kindergarten teacher. He told her "Every year, for the past 13 years, since the day you started kindergarten I've gotten every teacher, coach and principal to write a little something about you inside this book."
Have each teacher secretly sign "Oh, the Places You'll Go" from Pre-K to High School at the end of each year and give it to your child at graduation.