I teach pre-service teachers at California State University Fresno. I require them to use Twitter as part of our activities throughout the semester. I hope to help them to build a sufficient PLN over the course of the semester that they will not feel alone when they are put into a classroom by themselves. To help them get started I created this document. Due to requests for the document from people outside of my class I am posting it on my blog. http://goo.gl/vpyko