For the teachers’ advocacy nonprofit Educators 4 Excellence, designer Kati Curtis wanted to inject elements of fun into the workplace of what was a very serious, very focused group. Her point of departure was the organization’s bright green apple logo, from which she made the color green an element that threads through the entire space. Cheeky notes include an image of large-scale Granny Smith apples on the ceiling of the elevator lobby.

Wool felt lines a phone booth that appears to have landed on the natty, crosshatched carpeting in multiple shades of gray and brown.