"My sister instructs drawing."

Translation: Søsteren min underviser i tegning.

[pantzo84]

Why is there an 'i' after underviser

[fveldig]

In Norwegian you "instruct in something" and "instruct people".

[dametrotter]

You would never say this in English. You can "instruct" or "teach" a person or a class (of historians or artists..), but you only "teach" the subject (history, drawing...... ) If you say somebody "instructs IN English" it means that English is the medium for teaching whatever subject is in question.