Jeanne Gang's U of C dorms are just screaming out for trapezoidal windows, but it looks like she just used some clever trim work with the corten to create the illusion of irregular, non-square, openings:

U of C's website
I hope this design is foreshadowing the masterpiece I expect out of her at LSE. I could see similar ideas and forms being used to create "three buildings that weave in and out". Then again, I've never seen two Jeanne Gang designs that use the same idea twice. That's the funny thing about her work, it all looks very different, yet you can always tell it is a Gang. She's not like other popular architects today like Gehry where every building is just another take on the same crumpled up aluminum foil theme or Ceasar Pelli where every building is another take on the same tapering silver glass supertall theme.