the norwegian pupils in grade which was the main population in had an average score of which was higher than both finland and denmark again the norwegian scores are significantly lower mainly due to their lower age with the change of main population to grade the norwegian score in science was which was slightly below the swedish score of in the norwegian students in grade had an average score of in mathematics and an average score of in science these students are the same age as the swedish grade students as shown in figures all the nordic countries except finland have had results with rather small variations around the oecd average during the whole period