I completely agree with Rondina regarding Mark's course. It was a definite time commitment, but very well worth it. I am so glad I took it, and I know I will be using what I learned over and over again in my research. Many thanks to the Virtual Institute people -- and especially to Mark -- for a couple of very full and well-spent Saturdays (not to mention the time during the week working on the assignments). Barbara Schenck who disclaims any influence by the Virtual Institute. Just wanted to second Rondina's view of the value of the course.