IIT JEE distance learning coaching material. I bought this half a year ago towards the end of my 12th grade it really helped me a lot. I could watch all the lectures when i wanted and practice the problems given in the material.The special thing about this material is its divided into days and on particular day you just have to spend 30mins on one subject and the whole JEE syllabus will be covered in 6months if you follow this plan. You will have lots of time to practice problems on your own and the teachers who have given lectures are well experienced and you can find their details on kaysonseducation website. JEE coaching usually costs you around 1 lakh a year but with this material you can prepare at your convinience.