HI MR CHIANG. WELL FIRSTLY I WANT TO INTRODUCE MYSELF,I AM A FAIR BOY WITH A HEIGHT OF 1.76 .MY WEEKEST SUBJECT IS HISTORY THUS NOT SCORING VERY GOOD. I AM GOOD IN MY SCIENCE . I DONT UNDERSTAND FOR MATHS IS HOW TO DO INDIRECTLY PROPORTION THUS I HOPE YOU CAN START A REMIDIAL CLASS TO HELP THOSE WHO HAVE PROBLEM IN THIS SUBJECT.