University of Cambridge
University of Cambridge: Nrich: Napier's Bones
Use this one page website to learn how to multiply and divide a "new" way. This method was invented over 400 years ago by John Napier. A detailed explanation is only a click away.
National Council of Teachers of Mathematics
The Math Forum: Lattice Multiplication
Great web site that offers a detailed summary of how to multiply using the lattice multiplication method.