There are no hard-and-fast rules for answering those questions. There have always been different theories of education which are based on different attitudes to education and to life itself. Roughly speaking, these theories have two opposite ends. At one end is child-centered education. This is concerned to adapt the teaching to the needs and development of individual children, and is most used in kindergarten and primary education. The other end is society-oriented. It aims to make sure society gets a steady supply of young adults able to fill the jobs and roles which society needs to be filled. In some countries the approach would be more religion-oriented. This would aim to produce young adults whose main aim is to live according to the precepts (beliefs, practices) of a particular religion.