This is the 577th most frequent Dutch word.
schreef
"Schreef" means "line" or "boundary" and can also refer to "serif" in typography.
In this sentence, 'schreef' (past tense of 'schrijven') is used to indicate the action of writing that occurred in the past.
Hij schreef een brief naar zijn vriend.
He wrote a letter to his friend.
Here, 'schreef' is used to describe Marieke's action of writing notes in the past.
Tijdens de les schreef Marieke enkele aantekeningen op.
During the lesson, Marieke wrote down some notes.
In this context, 'schreef' describes the act of Jan writing a poem on the board at a past moment.