Middle school v high school advice

[em_angharad]

I did my student teaching and degree in high school math, but have just gotten a job teaching middle school math/science, starting in a week. Is there any advice people can offer about how middle school differs from high school, what works differently, what's worked for you, or just general stuff? The school is entirely aware that my background is different, so they'll be supportive, but any advice people have to offer will be great.

(Have cross-posted more than I generally prefer to do, but there you are -- I'm quite nervous.)