if you had written "im glad im not any of your teachers" or "im glad i dont have to teach you" it would have been fine. you said "im glad im not your teachers" which clearly means that between us we have more than one teacher, and you are glad that you arent both/all of those. its a perfectly acceptable mistake, especially as this is a forum for some game on the internet and i dont expect you to reread thoroughly or at all, because who cares. thats the same reason i dont bother to use capital letters or apostrophes, like i would if i was writing an actual essay. my spelling is perfect (not counting typos), my grammar is at worst only acceptable, when im really not putting any effort into what i write. if you could produce some actual evidence of me being a bad writer, id like to see it.
if i were you, i would also refrain from insulting my writing when i have just pointed out quite a large grammatical error on your part (which i might call ironic, if i wasnt so sure you would start a pedantic discussion on the meaning of that word). and not only that, but after you [haughtily](
http://www.thefreedictionary.com/haughtily) attempted to correct it. i cant believe that you didnt understand the intent of my 11-word criticism. im glad im not your students. but only because it must be very confusing to exist as 30 different people simultaneously.