Is coaching material sufficient to clear IIT JEE?
If you join a good coaching and study the coaching material then it is sufficient to clear IIT JEE. Many people suggest good books for IIT JEE but students use these books not a lot, mainly they use coaching material and notes. Good coaching materials are really helpful if you understand the concepts from it. And if you become able to solve the practice problems or different types of problems then these are enough for you to crack JEE. In case you face problems then you need to take help from other books. While studying make your own notes and revise frequently. You can talk to JEE toppers on call and listen to their preparation strategy. If possible take guidance from JEE mentors, they will guide you properly how can you improve your preparation.