We all learned a little... or a lot - depending on how lucky you are. Remember your first teacher? And what about the evil mathematician who gave you your first “fail” at the institute? Of course yes. Another thing is interesting: do they remember you - and, most importantly, how exactly you remained in their memory? Do you want to look at your life at that time from the other side - from the position of a teacher? And also learn a lot of interesting details, sometimes funny, sometimes sad, about work at the university and about students, remember your youth if it has already passed, or better understand yourself if you are still young. Then this book is for you.