Anybody have any idea what this is?
Photo doesn't show quite the full width of the board; it's 9+ inches wide, and the photo probably shows between 7 and 8.
The wood has no perceptible odor, dry or damp (which also rules out oaks).
It's hard enough that I can't dent it with a fingernail, and surprisingly lightweight -- suggestive of ash, I suppose, but the grain isn't quite right, and the color is definitely not right, for that. Not heavy enough for oak, and the grain isn't right, either.
I'm located in Indianapolis, and the wood is presumably of more-or-less local origin -- it's been sitting in the corner of a high school wood shop for many years. Likely to be from somewhere in the Midwest, probably central Indiana.
Kentucky coffee-tree, maybe?