Here is Arnold on on-line education. Excerpt:
I am optimistic about tablets in large part because I believe that a magic bullet in educational technology is the adaptive textbook. By that, I mean an electronic textbook that adjusts to the cognitive ability and learning style of the student. Adaptive textbooks will query students in order to make sure that they understand what they have been studying. They will also respond to student queries. Adaptive textbooks will implement the many-to-one teaching model.
A glimpse of what lies in store can be found at the Inquire Project, which describes “an iPad app that combines the popular Campbell Biology textbook with a knowledge representation and reasoning system that answers students’ questions about the material.”