A book by SeymourPapert. Subtitled "Children, Computers, and Powerful Ideas". Basic Books, 1980. In it, Papert proposed a DebuggingApproachToLearning.
There was a copy on BiblioFind ("GOOD COND, BUT HAS NOTES INSIDE") when I looked.
Papert's best book. Good reading for anyone interested in teaching, learning and/or computers.
See also LegoMindstorms