Sir I want to do IIT but by school study feel that I never can crack jee mai or advance . so me idea for preparation of exma.

@ rahul 
u need to just keep checking your progress level everyday , join with askiitians self study package and it have everything to clear your concepts and it also have test series , 
frst of all dnt feel low , u need to maintain confiodence , the 2^nd thing clear your besics from ncert , then move to other books . 
and 3^rd , do the previous year ques papers and analyse them . 
LATS but not the least – u need to keep your hobby and sleeping habit as its nessasary for sound mind . 

ALL THE BEST