My daughter will be moving to middle school next year (6th-8th) and I'm working with the new middle school PTO. There wasn't much information for incoming parents, so we developed a one page front/back newsletter with some basic info. It's been well-received by the 5th grade families.
If anyone is thinking of doing something similar and wants a copy, I'll be glad to share.
Please email me at (look in profile, click on icon that looks like an index card) rather than posting requests. I work from various computers and emails come to the one with my PTO files on it.