Let me introduce an ideal sistem of exams. In my opinion, the students should pass exams with unlimited time, because some students are very nervous, and they can't focus on exercises. The students should pass two compulsory subjects (maths and Russian) and one subject optionally, because if the students pass too many subjects, they can't learn the information well, that's why they can't pass the exam on high mark. I think that students should have some practice in subject, that they pass. For example, if they want to pass history, they should learn to work with different historic documents and pass it on exam. If the students want to pass English, they should practice their speech with native speakers, and to pass it, so they should have some practice. This is the ideal sistem of exams in my opinion.