Today I am in best GGSIPU college in Delhi all because of VIDYAMANDIR classes. I cracked down many exams like SRM, VIT, JEE(mains).
I like this school because of way they teach is very different the faculties are awesome. The only dislike is the speed they complete the course.
The person who really wants to clear or crack IIT, BITS pilnai NITsetc. should have to prepare from the starting of class 10th.