Usually they follow parents. What were the parents like when the kid was young? Cant them to behave like angels when the parents act like hitler
Teens also get rebellious because they are bullied in school, talk to the child or their friends to find out more, and do something
Parents not showing love or spending enough time with the child leads them to do things to get attention. When was the last time you asked, how was your day. What a child needs is unconditional love. Dont say if you dont do this, I dont love you. Love them for who they are.
Did you shame your children in front of relatives, or compare with other siblings who are smarter? Good grades isnt everything. As a parent you should ensure they grow up happilly no matter what the academic performance is.
If you feel you need help, get a counselling. Every school has one. start from there.
