Does school prepare us for life?

In my opinion school doesn't prepare us for adult life. The school teaches only a piece of knowledge from various fields of science, most of which won't be needed in adult life anyway and we will never use it. There is a long list of skills that we should acquire at school and which will be much needed in life, for example "motivating oneself to act". Apparently, school grades should motivate us at school, but it's just the opposite, they more often demotivate us. At school, we should learn to organize our work, our school duties should teach us organization but it is not. Most students don't know and can't  plan their time well. It is very important in life to deal with stress in difficult situations, school doesn't teach it, and as it already tries, these are activities that don't help. Assessments and competition between students cause an increase in stress that not everyone can manage. School should teach us how to work in a group and communicate with people, recently we meet more and more often that people can't do these two things, although they should be so easy and simple for us. These examples show that the school doesn't prepare us for adult life.