'Henne i skolen skulle Ivan Olsen og de andre børne lære bogstaver og al den slags.'
I can't understand the meaning of this 'al den slags.' Does it mean 'all kinds of letters' or something like 'all kinds of things'?
It means: And all those kind of things.
I think, it means rather "and all that", "and things like that". "И всё такое".