I teach a self-contained class of 5 students with autism, grades K and 1. I have a teacher's aide/para who's been in the system for several years, and she came to my school last year. She had a reputation within the school for being difficult to work with, but I thought I might be able to avoid this with a little work. As it turns out, I'm having a really hard time with her after all. She has yelled at my students on more than one occasion. Not raising her voice (we all do when we absolutely need to) but YELLING. She says insulting things to them that have made me drop my jaw in absolute shock. When I had to take a half day, she let one of my students walk around with stool in her panties and got mad at her when she tried to wash her own panties in the bathroom sink (I know; the aide told me the next day). Those are the most egregious examples, but there are lots of little things she does that a teacher just shouldn't do, and they're things that I don't want to be done with/to my students. My question is: Who do I go to first? My ESE Specialist was my mentor last year, and I know she's willing to listen. Some of this stuff could be taken to administration right away, but I don't know if I should. I'm only a second year teacher, so I'm still not sure where to draw the line. Any suggestions?