Ways to advance the field of computer science education as a non-researcher I understand, as a model, how a researcher at a university can advance the entire field of CS Education.  Less clear to me, however, are methods available to teachers in the field who do not have doctoral degrees, much less a publication history.  Beyond posting on this website, what ways are available to advance the field of CS education?
Actually 

(a) you don't need a doctorate to do research,

(b) most university faculty don't do research in CSEducation, but in CS,

(c) most conference committees don't care much about the formal credentials of those who submit papers to the conference. SIGCSE, for example, has quite a lot of work by people without doctorates. 

However, what you probably do need is contact and communication with like-minded people with an interest and some writing ability. 

I hope this doesn't become just a list of options, but there are quite a few. 


Probably the most productive line for a person at a smaller institution is to try to make contacts with those writing and doing research in a field that interests you. If you express interest you might get included in their normal communication mechanism. Often people need to work remotely from colleagues, so you have no real disadvantage there. Find a paper that interests you and write to its authors to ask what they might be working on that you might contribute to. 
If you are in an area with quite a few educators you might try to found a discussion group among teachers in similar positions. It could lead to bigger things, but you need to be able to keep up with what is going on through reading. Once established you might be able to invite a university educator to one of your meetings, spreading your contacts. You might also be able to extract an invitation visit any working groups that the University might have. 
Try to find a way to go to either a national or one of the regional conferences of educators. You will meet a lot of people. The Consortium for Computing in Small Colleges holds a conference annually in each of the major regions of the US. I expect they will be happy to ignore the fact that you might be a secondary educator. 
Get involved in APCS, not just as a teacher, but as a contributor. One option, if you have the time is to become an AP grader. This is an annual event in which you will work hard, but also meet a large number of people interested in CS Education, some from the Secondary Level and some from Universities. 
One of the groups that should probably interest you is the people who write Pedagogical Patterns. These are based on experience, not research, and go through a vetting process to validate them to the community. Among other things they do is help one another write (shepherding) and a formal process of feedback at the periodic conferences (workshopping). Any pedagogical pattern you are likely to see has been re-written a dozen times with feedback from, perhaps, a dozen to twenty people. It is a vibrant community.