Giving the bad students the idea of education will never be of useful act. It is true for all times and evident that a bad student remains as a bad student and nothing else. The society can never derive anything constructive from him. So, good students should only be educated.
Because many people do not have an interest in studying. Instead they go to school and cause chaos; they might bully others, disrupt classes and influence others. I agree that everyone deserves basic education but tertiary education is not for everybody. It should only be for those who actually make an effort to study.
Every kids are different. They have different hobbies, different talents, and different weakness. Education should not merely judge a kid from a general prejudice of what is smart and not, but instead target the specialty of each individuals; of which will require more funding to do a Personality test rather than IQ test but will truly benefit the economy when their talents develop.
I really think that everyone deserves to have the right to an education and that there has to be a reason why a student doesnt succeed in school, like maybe there is family problems or personal problems. I really think that everyone has the potential to be great and its not fair to just take that away without knowing the root of the problem with the student.