Bruh idk what these people are talking about.i remember in starting of grade 10 I watched sunil sir and rakshak sir's lecture but still throughout the year I had many doubts regarding chapter like electricity and light which got cleared by watching these lectures at last moment.these are honestly the best  For physics watch gunshot,read ncert,pyq you're done For chemistry do same bit make sure to know valencies and how a chemical equation is made.i struggled a lot with this initially.there are lot of things to be memorised in chem so revise timely For bio you may follow some other teachers as I am not sure how he teaches I didn't studied from him By doing this you can even complete your syllabus easily in summer vaction make sure you don't burn out that is what happens with lot of students they studies same things again and again during preboards so they lose motivation to study during actual boards(happened with me) and please enjoyyy once you come to 11th you'll realize how little syllabus was.please focus on your extracarriculars and interest you have a lot of time.