In my opinion, teachers should pass the tests verifying the level of knowledge every 10 years. Every year, the changes are carried out in the basis of the software. There is a change of textbooks and news coverage for individual classes and schools. In order to truly teach you need to expand your knowledge and nurture it by repeating the content and preparation of the lesson. Unfortunately, not all teachers are doing. A lot of them neglects this duty, which leads to a low level of knowledge of students. The lessons become dull and uninteresting. In addition, psychological tests to help determine whether a teacher is suitable to work with the student.