People blame every problem on the deafness. A profoundly deaf friend told me about the problems she was having with her hearing daughter. She thought the problems were caused by her own deafness. I was having the same problems with my own daughter who had normal hearing. We all have troubles with teenagers and deaf ones are no exception.
People often think the deaf understand more than they do.
No one likes to look foolish so often a child will pretend to understand when they do not. I recently met a mother I used to work with. Her son has done very well and is in the top group at school. However she told me there are often misunderstandings. He recently missed his school trip because of a mistake with the date.