Real Driver training should be mandatory. The “normal” schools do not teach car control. If I had a teen they would be going to this school. http://www.streetsurvival.org/index.php
I took my nephew to an empty parking lot. He practiced panic stops, getting front tires on the stripes (car placement practice) and getting a feel for the car away from traffic… His biggest problem was not look down the road. Looking just over the hood makes it too late to avoid a situation. He also tended to follow the car in front of him. As I learned in racing, not looking thru or past the car in front of you can make you follow their off/accident.
Come winter take your teen to a snow covered lot and practice skids. Just pull up on the parking brake(if equip) and let them get out of it.