Informal CPD
Too often we think our professional development is only possible through a certificate. That's wrong.
I have been teacher training, helping teachers in one capacity or the other since 1993 – the first time I went to a large high school in the Czech Republic and tried to provide some guidance for Czech teachers of Russian to change to Czech teachers of English. It was a disaster in more ways than I can even list. But on another level, there was success.
I kept the sessions focused on the teachers who in groups, with coffee and tea in hand, just chatted about their own challenges, shared their own struggles in teaching English (of course in Czech or Russian). Perhaps my own incompetence was a blessing. [I’m a big believer that professional development training sessions should be held in the teachers’ own language. It’s not the time for English language development.]
I believe we don’t emphasize enough the strength, power, role of informal professional development by teachers.
This can be simply thinking about how the day went while on the bus going home. Or it can be coffee with a colleague “talking shop”. It’s possible in so many other ways. My own teacher reflective journal (find it free here - Zen and the Act of Teaching) is often used informally by teachers. They complete a journal entry, read it to each other and then discuss with each other. Easy peasie.

Even just your own reading, following strong teachers online and their own comments about teaching (see our LinkedIn group!) should be considered strong professional development. Or even like me, start your own blog! I know one teacher who always said “My blog is my PhD in education!”
We have these big conferences, now summits and webinars. Like Abraham speaking to the masses. Even when we do devolve and make the training more “teacher” centered, we do so with handouts, exercises, finish this, read that … It’s all really soulless.
I have developed more as a teacher through my own thoughts post lesson over coffee, than through any (put your favorite ELT rockstar name here) auditorium speech. I have developed more as a teacher just talking to my fellow teachers informally, on the ground, “in situ” than from traveling either in bits and bytes or by jet airplane to a faraway place.
In all my teacher training sessions where I’ve had control. I’ve really tried as much as possible, despite the constraints by those wanting specific outcomes (outcomes which are usually puff – what stays is education and that which stays is usually something much different than that intended), – I have tried to keep things personal, to listen more than talk. That should be the true role of a teacher trainer – to listen. More a counselor than an “expert”.

There have been efforts to reform professional development but little has occurred. We have the same tired large entities doing the same things online as they did before. They don’t change their colors. We’ve had Ed Camps, we’ve had other efforts at teachers informally learning from each other – I applaud these – but they are few and far between.
Let’s value a teacher that learns socially with colleagues, with their own self. That shows development not through attendance of webinars and plenaries but through active participation in their own doings, goings, beings, teachings.