Thank you so much for the LINK of Side by Side Books that you sent me by message but I think I should change mind.
Because my new students they are from high school so, I think I should teach them English Grammar by these books. I'm not very good in English grammar yet but I'm sure by the time of teaching them it would make me get better in Grammar because before I teach them I've to learn it first. And at least I used to learn these books when I was in college so, I think it's not too hard for me to learn it again myself and then teach them. :)
Trying is better than nothing.
And I am dare to teach them :)