found this from one of the Enigma links
From Professor Vestegaard who currently teaches at “gymnasium” (high school) level (in Northern Europe the Gymnasium is a type of school, not just the place to exercise your physical body, but your brain as well)
(Although Mrs Robinson probably knows all this maths anyway :laugh_at: )
Matematik for gymnasiet og for andre interesserede
for those who cannot read Danish (I can just about manage it as it is similar to Dutch and German) he has provided a list of English sites
Links til Matematik Sites
