People are often surprised that my husband, who lives 3,000 miles from his daughter for 2/3 of the year, knows what she is working on at school, talks regularly to her teachers, has been to her brownie meetings, and is on a first-name basis with the parents of several of her friends.
In fact, he is so active in my step-daughter's classroom throughout the year that last year when they calculated volunteer hours for a thank-you event, my husband had logged more hours in the classroom over the course of the year than any other parent.
I'll join in giving him, your ex, and all the other great dads three cheers!
Parenting four little monkeys (11, 8, 6, and 4) with the love of my life. Making it up as I go.