PD is essential in all schools.  It keeps the learners instructing learners learning … so, in order to make sure that there is an awareness and use around PD sources, I made the following clip a while ago :

http://www.youtube.com/ISPrague#p/search/0/XhaWcdslqgI

As we develop a Professional Learning Community here at ISP, this kind of information becomes essential to the school growth.