I found a copy of the paper here: http://www.columbia.edu/~cp2124/papers/computer.pdf http://www.columbia.edu/~cp2124/papers/computer.pdf The homework assignm

I found a copy of the paper here: http://www.columbia.edu/~cp2124/papers/computer.pdf http://www.columbia.edu/~cp2124/papers/computer.pdf The homework assignments are not described, but given that many students do not have computers, it is reasonable to assume that the assignments at least did not require computers. The computer vouchers came with free "educational software", but few households installed it, and essentially no one spent time using educational software, in either group. Printers are not mentioned.