"IDA: an Interactive Document on Algebra" Arjeh M. Cohen Dept. of Mathematics \& Computing Science Eindhoven University of Technology POBox 513 5600 MB Eindhoven In this talk we will present interactive course ware, both for teaching and learning mathematics in a novel way. The topic is first (and second) year undergraduate algebra. high school mathematics, the student is supposed to know just a little The presentation differs from that of an ordinary book on the subject in that each page has a tableau on which the core information is displayed, and little else. Further information, such as a proof of the result, is available at the click of a button. We will discuss some of the experience we gained and the few guiding principles that we kept during the manufacturing procedure.