What is the best study material for IISER, NISER preparation?
To be honest, there is no particular answer to this question because it’s a very subjective question and depends on how you can grasp the concepts in the best way either through self-study or with the help of a mentor/coaching material, etc. because there are people going to good institutes with and without coaching as well.
Do you need books or not? It depends on your preparation. If your concepts are clear, you can opt for books but if you want someone to boost your confidence with live classes and doubt-clearing sessions, then books may not be required in your preparation.
Also, as a matter of fact, you will always need a mentor whether it’s a coaching mentor, school mentor, parents as mentors, or anyone but mentors are important to guide you and train you for clearing the entrance exams successfully.
Now, in general, you can opt for NCERT or HC Verma for preparation. NCERT is good for basics and HC Verma has some good questions but I would prefer coaching modules over both because while solving questions from the books, you can come across some questions which would go unanswered in the absence of a mentor leading you to feel demotivated at times. This can hamper your mindset and eventually, your preparation.
Also, coaching modules are made by mentors after refining the contents from all the best books for entrance exams, hence giving you the best collection in a single place. They are also segregated levelwise to match your requirements and are made with complete strategy and direction by the mentors.