"صَحيفة اَلْأُسْتاذ في مَكْتَب اَلْأُسْتاذ."
Translation:The professor's newspaper is in the professor's office.
According to "sundus", SaHifa is more general than jarida so then we can say jarida is a part of SaHifa. "Jarida" is a daily newspaper which consists of news only while SaHifa includes all types of publication, ie., advertisement, stories, article (majala/magazine) and news (jarida).
So... From one point of view, both can be synonymous (referring to almaany).