There are at least three punctuation errors in your post. Definitely a case of the pot calling the kettle black. You're not alone, though; there are many so called teachers posting here who couldn't punctuate their way out of wet paper bag. Nevertheless, that doesn't excuse your haughtiness - nor my own for that matter. What's galling about your post, though, is that you seem to be quite enamored with your own qualifications as a teacher; however, you've still got a lot to learn. One can only hope that you're not teaching writing. Better stick to teaching Oral English until you sort it all out.