I've utilized boards that have to do with classroom organization, more specifically desk/seat arrangements -- I'm always looking for new ways to "redesign" my classroom. Also like the boards discussing Socratic seminars/discussions and fishbowl discussions -- both methods I'd like to utilize more. As a middle school English teacher I could gather lots of ideas from the following boards -
https://www.pinterest.com/teachers/middle-school-english/?lp=true