Where do you start
The very first thing to do is to put yourself under the microscope.
Are you helping or inadvertently hindering your teens progress?
If youre in the habit of nagging your teen to study and to do their homework, youve got to stop. Long term, nagging isnt going to get you or your teen anywhere. Your job is to be encouraging and supportive. You want your teen to know youre their friend, not their enemy.