Dear Didi,
I am sure your teacher wants you to be successful persons in the life. This is just a way to make you understand that you can do a lot of great things in the life. Your teacher does not want you to lose your energy on negative activities, but on working hard to achieve the best outcomes.
Try to listen to your teacher. She is like your mother, wishing you to be good and successful children.
Looking forward to seeing good results from you.
Ann