I am a graduate student at New Mexico State University working on my PhD in Physics Education. I just came across your site and wanted to just make a comment. I found this site GREAT and I am sure there is a number of applets that you have created that I would like to make use of. I hope that this will be okay with you since you are the author of the applets. I have tried to make my own but have had some trouble getting them to function properly. Thanks