As a writing teacher and research of writing technologies, I have a special place in my heart for the overhead projector. There's something about the flexibility of the overhead projector that PowerPoint, digital projectors, and whiteboards don't quite capture. It was crucial for one teaching stunt I pulled spontaneously one class period a few years ago.
Nostalgia aside, I didn't have a projector in my class this quarter and seemed to get along fine without it, from a pragmatic standpoint.
[Ode link via Boing Boing]