"The pupil thinks there is too much homework in school."
Translation:Eleven synes, der er for mange lektier i skolen.
"much homework" can also be "meget hjemmearbejde" in Danish. Even though 'hjemmearbejde' is a bit old school.
When talking about institutions in general, in English you don't use the article, you just say "We had biology in school today." If you said "the school", it would be a specific building.
In Danish that's different, you tend to use the articled form with institutions: "Vi havde biologi i skolen i dag."