Hello,

Jee advanced is one of the toughest exam and the selection rate is very less when compared to other exams .So one should have a master plan for the preparation.As you are dreaming for IITM ,as you know it is the top ranked campus so you have to put in all effort for the same. It is to be noted that you should do smart work rather than hard work.

Coming to your question. Yes, materials provided by the institutions are well framed and structured. It clears all your basics and enhance your problem solving skill. Referring some books is your choice, and of course you can benefit from that as you get better exposure to numerous patterns of question. But the important thing is you should be up to date with your regular topics and clear your doubts. Only after completing your materials and problems you should go for extra books. So be clear with theory part and complete your materials first. It is good to have extra reference but not important. More importance is for giving mock test and previous year paper. As you are in 11 you can solve HC verma for physics as it is the best choice . You can buy them when you feel to have extra practice.Try getting second hand materials and most of the institution have libraries(if classes are offline).

For last year the rank for IITM Aero dual was 2729-3816

So do your level best.

Use the link if required

https://engineering.careers360.com/articles/jee-advanced-syllabus

Good luck!!