How to Score 90 in CBSE Class 12: Preparation Plan and Exam Strategy That Works

Class 12 feels different from every year before it. The syllabus is heavier, the stakes are higher, and everyone around you has an opinion about your marks, your college, and your future. In the middle of all that noise, a 90% is still a very achievable target.

The students who get there rarely have a secret. They follow a clear plan, practice a lot of questions, and walk into the exam hall with a strategy. This guide breaks down how to score 90 in CBSE Class 12 in a way you can start using this week.

Know exactly what you’re being tested on

Before studying anything new, get the latest CBSE syllabus, the marking scheme, and the sample paper for each subject. Most subjects split marks between theory and practical or internal assessment, so a good chunk of your total is already within your control long before the written exam.

Look closely at the unit-wise weightage. If a chapter carries 12 marks and another carries 4, your hours should reflect that. Good Class 12 preparation starts with knowing where marks are concentrated, not with equal time for every chapter.

Make NCERT your foundation

Across Physics, Chemistry, Biology, Maths, Accountancy, Economics, and the humanities, NCERT is the base of the board paper. Read every chapter fully, including the examples, diagrams, and boxed text. Then solve all the exercise questions.

When you’re stuck, check the NCERT Solutions for Class 12, but only after you’ve genuinely tried. The goal is to understand the method, not to copy the answer. Once NCERT is solid, move to reference books only for extra practice, and only if you have time left over.

Build a study plan that survives real life

A plan only works if you can follow it on a tired Thursday. Keep yours simple:

• Early block (2 hours): Your toughest subject, ideally before school or first thing after waking.

• Afternoon block (2 hours): Concept study or chapter revision.

• Evening block (1.5 hours): Problem solving or writing practice.

• Last 30 minutes: Quick recap and updating your error notebook.

That’s about six hours of focused work on regular days, and more on weekends and holidays. If you’re also preparing for JEE, NEET, or CUET, aim for overlap. Chapters like Electrostatics, Organic Chemistry, and Calculus serve both goals, so study them once and study them deeply.

Subject-wise exam strategy

Physics: Understand the concept before you touch the numericals. Keep a formula sheet with units, and practice derivations until you can write them cleanly. Ray optics diagrams and circuit problems are reliable scoring areas.

Chemistry: Split it into three parts. Physical needs numericals, Inorganic needs repeated revision, and Organic needs reaction practice. Write named reactions and mechanisms by hand every few days.

Mathematics: Solve, don’t read. Do a set of questions from every chapter each week, and revisit your mistakes. Calculus, Matrices, and Vectors have high weightage, so master them. Show every step, because step marking matters.

Biology: Focus on NCERT line by line. Learn diagrams with labels, and make small comparison tables for topics like mitosis vs meiosis, or DNA vs RNA.

Commerce subjects: For Accountancy, practice entries and statements until they feel automatic. For Business Studies and Economics, write short, point-based answers with the right terminology.

Humanities: History and Political Science reward structure. Learn key terms, dates, and examples, and practice answering in clear points. For Geography, don’t skip map work.

English: Master the writing formats, practice the reading section for speed, and understand the themes of each literature chapter instead of memorizing answers.

Practice papers are non-negotiable

Reading builds understanding, but papers build marks. From the start of the final stretch, solve previous year papers and CBSE sample papers under timed conditions, with no phone and no pauses.

After each paper, spend as much time analysing it as you did writing it. Sort your lost marks into categories: concept gap, calculation error, time pressure, careless reading, or poor presentation. Then write each mistake in your error notebook and reread that notebook before every new paper. You can find previous year papers on Wired Faculty to start with.

Revise on a schedule, not on impulse

Strong revision happens in layers:

1. Daily: Fifteen minutes on what you studied that day.

2. Weekly: One session to go back through the week’s chapters.

3. Monthly: Short notes, formula sheets, and diagrams for everything covered so far.

Spacing your revision keeps knowledge fresh and prevents the last-month panic where you realize you’ve forgotten half of Term 1. For planning your calendar, the CBSE Board Exam 2027 timetable guide can help you work backwards from the exam dates.

Exam hall strategy: where marks are won or lost

Two students with equal preparation can score very differently based on how they handle the three hours. Keep these habits:

• Read the paper first. Use the 15-minute reading time to plan which questions to start with.

• Begin with what you know best. It builds confidence and secures easy marks early.

• Watch the clock by section. Assign a rough time to each section and stick to it.

• Write for the examiner. Use headings, numbered points, underlined keywords, and neat diagrams.

• Show your steps. In numericals and proofs, working earns marks even if the final answer slips.

• Don’t leave blanks. A partial answer can still pick up marks.

• Keep ten minutes for review. Fix silly errors and missed parts.

Protect your energy

Marks drop when you do. Sleep seven hours, eat properly, and take short breaks every 60–90 minutes. A twenty-minute walk or some stretching clears your head better than another scroll through social media. Set a daily phone limit, or leave it in another room while you study.

Also, stop comparing your schedule with others. Someone claiming ten hours a day is often getting three real ones. Track your own consistency instead.

Mistakes that quietly cost marks

• Skipping NCERT and relying on notes or videos alone

• Delaying the weakest subject until the end

• Studying without writing practice

• Solving papers but never reviewing mistakes

• Starting new topics in the final week

• Pulling all-nighters before an exam

Final thoughts

If you’re asking how to score 90 in CBSE Class 12, the honest answer is a mix of fundamentals: understand NCERT, follow a realistic plan, practice papers regularly, learn from your errors, and walk into the exam with a calm strategy. Nothing here is flashy, but it works.

Begin today with one small step. Pick your weakest subject, set a timer for ninety minutes, and work through a full chapter with practice questions. For NCERT solutions, notes, and previous papers, visit Wired Faculty.