Take for example this week's group of the week: Physics Teachers. A group formed for, unsurprisingly, Physics teachers - to collaborate, discuss and share ideas. Subject enhancement days are currently a hot topic in this group!
If you are a Physics teacher or take an interest in the subject, then this is the group for you. Not a Physicist? Then why not set up your own group? We have training videos here to help.
Whatever your interest, Yammer will surely help reduce E = P x t