As per the education system of India the division are awarded on the following basis :-1st Division :- If the overall aggregate in the examination is at least 60%.2nd Division :- If the overall aggregate in the concerned examination lies between 30% to 45%( 45% inclusive ).3rd Division :- In case one manages to secure an aggregate which lies between 30% ( 30% inclusive ) to 45%.The basic thing about securing good aggregate in any examination is knowing the pattern of examination and preparing according to that. As you are concerned about scoring good marks in board examination then you must go thoroughly through your prescribed textbook i.e; textbook by NCERT. Then you must go through the last year papers of same examination to have the right idea about the pattern of examination so that you can answer in the scoring way. http://entrance-exam.net/forum/general-discussion/how-much-should-i-score-class-10th-get-1st-division-how-should-i-study-get-score-2159748.html