We are discussing this from two very different cultural horizons. In Sweden everything after JHS is voluntary. I was not discussing the education of 10 year olds. Their education is compulsory. In Sweden 15 year olds are considered young adults, they are allowed to ride light motorcycles, have sex, choose the parent they prefer to live with etc. They are not required to move on to HS, although some 90 %+ do so, but this includes what in many other countries would be considered trade school.
Since the norm today is single parent families, the curriculum reflects that. Schools are no longer allowed to set unreasonable demands on the students. Only long stretches of absence or truance will lead to their study allowances being reduced, but this isn't handled by the schools and teachers but by the Student Allowance Authority (CSN in Swedish). Hence, teachers have neither carrot nor whip. Thus, if students don't want to study, teachers have to accept that as a given fact.
Trust me, if you think you have problems in the American education system, you will be very releived if you visit Sweden.