What were you surprised your student didn't know AFTER getting to college?

My D didn’t understand that you can’t just look up a doctor and go to their office. Luckily, she decided to call me from the office before going in when the receptionist asked for her insurance card. The doctor was out of network so I spoke to the woman and they agreed to cancel the visit with no charge. Oy, can you imagine paying OON for a gyno visit, which is supposed to be free!