I am a begginger but i would teach
1 how to talk to people very vaulble and it is one of the things i am good at.
2 how to fall and roll. you gotta know this even if you leave then you can imppress all the girls after you do a line of aikido rolls off your skateboard unscathed.
3. how to eat chocolate and conserver your energy. in my dojo we conserve energy for eating chocolate. so you can run all the way to teh nearest store. ( and be alive to help people.)