How should students from dummy school study for boards after jee?

Dummy school se hu so likhne ki zyada (steps and all) aadat nhi he, do I just revise from ncert and do papers? Please tell important questions jo har saal aajate he board me( jese 10th me prove root5 is irrational aata tha) and some important topics of physics and chem from boards pov English ka me manage kr lunga pls help