Free Technology for Teachers mentioned The Newton Project today and I thought you might be interested. The Newton Project is a non-profit organization charged with making all of Sir Issac Newton’s writings available for FREE in electronic form. Several documents are currently available (over 4.8 million words!) with even more on the way. This seems like a great opportunity for students to learn about the nature of science through a digital “primary” source and to also investigate one of our most treasured scientific and mathematical thinkers.