Meritnation is a great website. It helps the students in academics by providing study materials, revision notes etc. It explains all the topics of the chapter with the help of interactive videos and after completion of every topic and chapter there is a series of tests. There is a panel of experts who solve all the queries of students. Facilities like aptitude tests, interest test, personality development tests etc.
Make this website more interactive and helpful. It also prepares students for competitive exams like NTSE, AIPMT, JEE etc. But unfortunately such great facilities cannot be accessed by everyone since it is not free. However the prices of some packages are reasonable to a certain extent.