ZSJS is an educational-looking abbreviation, but its exact meaning needs explanation rather than an assumed expansion. I would want to understand the school context and the audience before following the information further. That is how I approach ZSJS school information. A useful introduction can make a compact name understandable and show a visitor which question to ask next. I appreciate clear descriptions of the subject, because the initials should help someone identify the page rather than become another barrier to understanding it.