IIT

First of all, I would like to tell you that in Mains / Advance at least 55 % of the questions come from class 11th and rest from class 12th. So, from class 11th more portion of paper come. Now to prepare well, you have to devote time on both but not simultaneously. I will recommend to firstly complete class 12th syllabus fully, then move to class 11th to revise. I hope, you know up to CBSE level of class 11th. So that, you can understand class 12th in holidays, try to cover class 11th portion. When you complete class 12th completely, then totally get focused on class 11th syllabus and prepare well. Also, take care to revise for class 12th syllabus one month before the board exam. Don't worry, be confident. Many people do it and you can also do it, if you work hard. Avoid social networking and use of smart phone. If you truly sacrifice something, then you will surely achieve it. So, study well and best of luck.