Lifelong learning
Late in his reign, a friend spotted Marcus [Aurelius] heading out, carrying a stack of books. "Where are you going?" he asked. Marcus was on his way to a lecture on Stoicism, he said, for "learning is a good things, even for one who is growing old. I am now on my way to Sextus the philosopher to learn what I do not yet know."
If you want your kids to value learning, if you want them to never stop furthering the education you've been investing so much time and money and care and worry into, then we have to show them what an adult committed to lifelong learning actually looks like.