Do makes a question when used with all verbs except a very small group (can, must should, would may) You cannot use Do this way with a verb ending in -ing so "do you going to school?" is incorrect. You must say "Do you go to school?" This sentence would be asking if this is a regular action you do. Do you attend school or do you go every weekday.. If you say "Are you going to school? " then you are asking if you are going right now, at this time. Remember: "you are + verb -ing indicates an action happening now. Hope this helps, John

Probably more correct: Are you going to school? and Do you go to school? I'm not sure)