I asked this question during an interview with a technology education teacher. What does the school set up for you or suggest for professional development (PD)? I was astounded when he said "it is all on you". The only PD that they require is usually general topics, nothing specific to content areas.
I admit that I use a lot of videos from you tube when I have a question in regards to welding or if I am stumped on some automotive problem. I usually reference my books, but YouTube will have a video of someone with the same exact problem I am facing. I see technology as a fantastic way to reach cognitive equilibrium. I have linked in some of my most favorite but probably not sanctioned avenues of PD.
The last may seem a little bit odd or maybe people don't recognize it as technolgy; I still regard books as my number one source of information. Further I will list what I envision professional development for myself.
I plan on obtaining a certification in welding after I finish my M.S. in education. As continuing education over the next ten years I would like to earn a degree in machining or machine technology. Automation is the future of manufacturing, but with out a good back ground in machining the common job will be a machine operator not an actual machinist.