I talk with a lot of teachers about how they become fulfilled or, in too many cases, frustrated in their profession. It isn't long in these conversations before the words "professional development" come up. You can practically set your watch to it. And I've discovered that where you find enthusiastic teachers enjoying persistent classroom success, you will find sustained, collaborative, educator-directed PD programs.
The importance of education cannot be overstated. Without a good education, one cannot get a good job, earn a good living, and provide for oneself and one's family. Education is the key to individual prosperity.