I always loved the challenging discussions around Professional development when it was my job to arrange all In Service Training. The biggest question as with teaching children is how to get the best or relevant topics for your most experienced teachers as well as the new teachers. This is often a hard call as training together in a large hall means that probably the average educator gets more than the two ends of the spectrum unless the development topic is focussed on them. So I wholeheartedly agree with this idea as this allows personal development to happen within a structured and sound environment. I hope it proves useful for you.