The aim of Shell Centre Publications has always been to ensure that a number of seminal works in the field of mathematical education remained available. We have now reached the point where our most popular items are out of stock, and have come to the decision that it is time to stop storing and selling physical books. Digital distribution is the best way to keep these works available, so in the coming months, we will be making many of the publications on our list available, for free, as PDF downloads.
These books are just great. The Language of Functions and Graphs, in particular, has a couple of career’s worth of great activities, lesson plans, and essays on teaching functions. Highly recommended.
[via Michael Pershan]