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.
Khan Academy
Khan Academy: Divide With Vsuals
Practice basic division using various visuals, such as arrays. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints.