kids are often open to role play, even teenagers are, if you're cool about it. when you teach you're playing a different role than outside school, so as long as you're natural, it shouldn't be too much of an issue. getting support from and looking cool to the trans friendly kids might help your kids a lot in accepting you. all kids want their parents to be seen as cool, and they're usually only embarrassed of their parents if they're totally uncool. my daughter loves my horrible hair colors, but i'm sure she wouldn't if the other kids didn't like it too. i hope to always be someone she can be proud of and brag about, and i think this has a lot more to do with my attitude toward her and other kids than how i dress (as long as i wear fairly decent clothing)