I believe that you know 90% of the subject if you know the basic concept of the subject/topic. We shall focus more on How and why rather than what. I have an experiance of 3 years. I am proficient in developi ng new lessons,worksheets and activities to expand learning opportunities. I would like to help more students about how to conquer the problem and get command over the subject. Lets be productive!h Happy learning! + more - less