I'd like to add that in some states (e. g. Bavaria) it is very hard to change to a higher track (especially Gymnasium) after the decision in 4th grade. The impo

I'd like to add that in some states (e. g. Bavaria) it is very hard to change to a higher track (especially Gymnasium) after the decision in 4th grade. The importance of that decision on later life is hard to underestimate.