It has been considered by many people that the early ages of a child, prior to school admission are impactful on their further life. However, others believe that teenagers, particularly at school are more crucial. In my opinion, adolescent behavioural habits in school decide their future perspectives, that's why it is incredibly important. This essay will discuss, in the first paragraph, how preschool life is influential and in the second paragraph, how teenagers life at school matter for their future.