What does it all cost? In dollars, to Penn faculty, not much -- we are quite fortunate. We still need more classrooms with equipment that lets us use these resources, but I have taught with Mosaic in a very ordinary classroom in the Towne building, thanks to a little wheeled cart with a computer and a surprisingly powerful projector. The Provost's Classroom Committee is hard at work guiding plans for more e-classrooms all the time; some of their work is already visible in the new Jaffe building and in last year's triumph, Williams 103-5. The ResNet program will put good network connections in dorms in the very near future, and let our students access these things 24 hours a day with high quality connections. Just in the last year, the atmosphere has changed dramatically, and the new Penn administration is committed to moving forward. (As for machines: it's an odd fact that for the last ten years or so, a machine that keeps you comfortably equipped for today and the next several years usually sells for between $2,000 [conservatively configured]to $4,000 [ambitiously configured to do the fanciest things at the edge of the technology curve]. Some schools at Penn now replace faculty machines every five years with a new one costing about $3,000: this is a good compromise. Our real problem at Penn is with adequate network connections for all faculty and with adequate machines of any kind for all staff. The best way to assure that such facilities become a priority is to use what we have aggressively, show better teaching, research, and collegiality arising from that work, and then make a case for more hardware. Go on to see what it's like in practice teaching this way or go back to the start of this guide to new tools for teaching. (And where will I find the time?)