i came across a site useful for iit aspirants
Visit https://kaysonseducation.co.in.
An IIT Alumina venture. They are providing 43 DVD contianing 300 hours of lectures. Complete
your 11th, 12th, IIT JEE, BITS, AIEEE, syllabus in 6 months studying 30 min. a day. It is
useful for all serious students who really wish to make it to IIT JEE, AIEEE with good rank.