One additional feature in Finnish comprehensive school concentrates on teaching
subjects where the teacher are highly specialised in the subject. In particular, lower
secondary school teachers in Finland study more subject knowledge than teachers in many
other countries. During these subject courses the student teachers in Finland become
familiar with the epistemological and ontological basis of the subject. This kind of
knowledge is important at school when teachers are guiding students in different kinds of
activities and problem-solving. Knowledge and skills learned in those activities are needed
also in PISA items.