How are the difficulties of growing up expressed?

The transition to middle school is a turning point in your life. In secondary school, new subjects appear – history, knowledge society, foreign languages, geography, biology, algebra, physics, chemistry. Thus, you have moved on to a systematic study of the foundations of the sciences. The organization of your education has changed: instead of one primary school teacher, there are many subject teachers, instead of one of their own office – a cabinet system. Much turns out to be new: teachers, their teaching methods, textbooks.