In the first 10 school years I was about 5 - 8 hours a day at school. With 5 school days a week that makes about 30 hours per week. My daily homework was about 15 - 60 minutes. I lived in Germany. I was not very happy with the school system when I was young (although I had good school grades) and nowadays I almost completely disagree what is going to be teached at german schools. But that video has made me happy. Congrats Finland!