I think it's a switch from grades/marks for elementary school vs. grades/marks for secondary school. https://en.wikipedia.org/wiki/Education_in_Norway#Primary_

I think it's a switch from grades/marks for elementary school vs. grades/marks for secondary school. https://en.wikipedia.org/wiki/Education_in_Norway#Primary_school_.28Barneskole.2C_Grades_1.E2.80.937.2C_ages_6.E2.80.9313.29 https://en.wikipedia.org/wiki/Education_in_Norway#Primary_sc... says, of primary school: > No official grades are given at this level. However, the teacher often writes a comment, analysis, and sometimes an unofficial grade on tests. Tests are to be taken home and shown to parents. There is also an introductory test to let the teacher know if the student is above average or is in need of some assistance at school. > ... When the students enter lower secondary school, at age 12 or 13, they begin getting grades for their work.