A very simple idea and one that can be accomplished in a short timeframe, especially over a school break.
Capturing iconic images of your school, and leaving few if any context clues, and be a fun post and engaging way for people to think about where they have seen that image before.
Take this one step further, one step more personable, and take pictures of the personalized areas of teachers’ classrooms, and ask people to guess which teacher. Perhaps they are a big fan of a soccer team, or of cats, or of the home city, state or country. These photos will help people get to know the teachers better, and personalize your teachers to your community.
A content strategy that humanizes the people of your school is a winning approach.