Hello Yash,

While NCERT may provide you a good marks if you are thoroughly done with it yet to score above average you need to put in extra efforts. You can consult following books:

• NCERT Chemistry Books of Class XI & XII
• Pradeep Objective Chemistry
• NCERT Physics Books of Class XI & XII
• Concepts of Physics by H.C. Verma (for both, Numerical & Theory)
• MCQ Physics by D.Mukerjee for conceptual questions in Physics
• NCERT Mathematics Books of Class XI & XII
• R.D. Sharma Objective

Along with these, you also need to work on previous years questions and model papers to score good.

All the best.