Let me be honest. I am asking this question since more often than not I am not at ease with my mathematician colleagues! Sometimes I feel they lag at least thirty years behind mathematics education developments! (Sorry, no offense :)). Consider that my question is not a personal and/or subjective question. Perhaps, you have also hired a mathematics educator in your department and you are also interested in finding a way to communicate with him/her and vice versa. Or not, for some reasons you are looking at one of the writings of those peoples, and more often than not you get disappointed since you can hardly find what you are looking for. What do you expect from mathematics education as a discipline?