From TV Guide:
The Office alum [Angela Kinsey]… will… pop up in the second episode of Season 3 to spar with Jess (Zooey Deschanel) and Schmidt (Max Greenfield), TVGuide.com has learned exclusively.
Kinsey will play Rose, a snobbish “cool” teacher whom Jess meets at the school where she landed the substitute teacher gig last season. Rose is turned off by Jess’ diligence and goody-two-shoes approach to her job.
Link: Angela Kinsey and Eva Amurri to Mess with Jess and Schmidt