Before anyone puts forth the argument that technology will replace teachers, they should read Will Richardson's blog response to the Wall Street Journal's article "My Teacher is an App".
I had the pleasure of meeting Will at an OTF event in the Spring of 2011, and he is a passionate proponent of 21st Century Education. Having taught for 22 years, Will is now a an outspoken advocate for change in schools and classrooms in the context of the diverse new learning opportunities that the Web and other technologies now offer. His passion is infectious, and his vision is clear. If you only follow one twitter account, make it his.
This page contains all the material used in my PD presentation on the "21st Century Classroom". Please feel free to use what you would like, but in return, please drop me a note and let me know how you use technology to promote collaboration in your classroom.