The manage - however some of them perform poorly friday morning during what you call High School. They have hangovers when they come in friday morning.
In a way it is good that those, who can not perform 100 percent on Friday fail due alcohol consumption during High School. In Denmark education is free. That means that the society has to see to that people, who can strain the amount of education, makes it and those who can not, leaves school and start to work instead.
If they somehow coache, receive therapy or drug themselves so they can make it through high school, the society perhaps end up with a person who choose a line of work where they will fail in the end, when they collapse from stress.
If an adult becomes an alcoholic or a drug user due to strain from the workload, we have lost money. Such people would benefit themselves and the society if there McJob are written across their career.
We believe that everyone has to be take care of their own matters - Even our children. Of course I ask my children about homework, but not the quality of it. 20 years of experience from selling Microsoft products have taught me that it is quantity not quality that matters. If they do not make it to high school, but choose to stamp papers in the local city hall instead, I am happy, if they are happy and relaxed about it.
In fact just to keep our youth under pressure, we are educating almost all doctors in Norway and Sweden in our schools and we have made our grade system so they can they can enter our school almost without having to perform anything. And we still manage to found firms, educate people to our health services and keep our society running with a lot of freeloaders, who has one purpose: To put our youth under pressure.