Teenagers definitely should not have part-time jobs.
Nowadays more and more young people want to get some part-time jobs because they want to earn their own pocket money. But it has considerable disadvantages.
Firstly, when teenagers do part-time jobs, they will have a busy schedule and they will get less time for studies. Teenagers will not have time to rest. So they will feel tired and exhausted and their schoolwork will not be successful.
Secondly, when teenagers have a busy schedule, they will have less time for themselves. It will influence on their health too. Young people will become stressful and nervous.
In conclusion, I should say that part-time jobs are not for teenagers. As most of them will not be able to cope with all these difficulties.