email: listserv@listserv.net put anything you want to in the subject line message body: subscribe LISTNAME YOURNAME example: subscribe PBL-IIST Mike Skinner Problem Based Learning List: PBL-IIST Annenberg/CPB Math/Science Project: MSPROJ Discussion on teaching mathematics: SUSIG Thought for the Day List: TFTD-L Mathematics Documents: MATH-L