An UNRWA school in Syria has featured posters encouraging Arabs to kill Jews with cars.
The Rameh school in Damascus has included this poster, which translates to "car intifada - run over"
And also this antisemitic cartoon with the frightened religious Jew running away from a toy car controlled by the happy Palestinian Arab:
This is from the official Facebook page of an UNRWA school, not of individual UNRWA teachers.