Publisher W.W. Norton has launched Chapter Select e-Books program for schools, allowing teachers and students to choose which school book chapters they want to buy--building a customized online textbook for the classroom.

Prices average between $1 and $3 for each chapter, with $20 as the minimum e-book price. These books can only be read online, but students can use note-taking, highlighting, and search functions. Available titles include a full range of disciplines.

Here's more from the site: Save your students money. Assign only the textbook chapters you want ... After you create your Chapter Select Ebook, students can easily purchase it at nortonEbooks.com." (Via Ryan Chapman)