JEE

The answer depends on the region where you are searching for the coaching. Let's see the scenarios of some of the major cities:
1. Chandigarh is the coaching hub from the past decade. The best coaching in Chandigarh would be Lakshya Institute since they managed to produce AIR 1 in JEE 2017. Allen Institute also gave top ranks in JEE 2016 and prior years as well.
2. In Ludhiana, institute named Edusquare has got everybody's attention and has given even better results than Aakash, and it's growth is exceptional. They have a selection criteria because they have a very limited seats.
3. In Jalandhar, no institute has done things better than Knowledge Campus. They've been consistently giving results and the faculties are very well experienced. The assignments and the tests conducted are top notch.
4. In Patiala as well, Lakshya Institute has had the monopoly of producing results.
5. In Amritsar, you will have to join Aakash institute or Veron Institute as these two are the most successful ones in this region.

JEE is the tough exam in which student really prepare hard to crack the exam and the syllabus prepared by the board cover all the portion of class 11th and 12th but BITSAT exam is also one of the tough exam in which one has to score more than 300 marks in the exam for getting admission in BITS Pilani. In BITSAT exam there is a more portion which is english and logic reasoning so this portion needs some more attention in which if a student really practices this problem then he or she can solve all most all problem correctly.
These two part are bonus point if someone prepared all other portion perfectly. After completing the chapter try to practice through the previous year question and try to solve the problem before time and if any question left unsolved then try to overcome these question so that in exam you can solve the question which gives you confidence. No extra work just practice previous year question and the two more portions english and logical reasoning question.
All the best!!