How to Score 90% in Board Exams

Understand the Exam First

90% is not about studying everything — it is about studying the right things correctly. The first step is understanding exactly what the board expects.

Get the official CBSE marking scheme: CBSE publishes marking schemes for previous years' papers on cbse.gov.in. The marking scheme shows exactly which keywords and points examiners look for in each answer. Reading five years of marking schemes for a subject tells you more than reading the textbook twice.

Know the weightage: Every subject's sample paper comes with a blueprint showing topic-wise mark distribution. Chapters with higher marks deserve more time. In Class 12 Accounts, chapter weightage shifts every year — check the current year's sample paper.

The 80:20 rule: In most subjects, 80% of marks come from 20% of the content — key concepts, frequently-tested derivations, high-weightage chapters. Identify these first.

Build a Realistic Study Plan

Start with a subject-wise audit: List every chapter in every subject. Rate each chapter: strong, average, or weak. Allocate revision rounds accordingly — weak chapters get 3 rounds, strong ones get 1.

Three-phase plan: Phase 1 (Oct–Dec): Complete all chapters with notes. No shortcuts — read NCERT carefully. Phase 2 (Jan–Feb): Subject-wise revision from notes. Solve 3 previous years' papers per subject. Phase 3 (Last 4 weeks): Solve full papers under exam conditions. Focus only on weak spots.

Subject-specific time allocation (Class 12 Science example): Maths needs daily practice — even 30 solved problems daily compound into 10,000+ by exam time. Chemistry is memory + understanding; revise once a week. Physics requires concept clarity first, then numerical practice. Biology is the most scoring for consistent readers — NCERT line-by-line is non-negotiable.

Master NCERT — The One Non-Negotiable

For CBSE boards, NCERT is not a starting point — it is the primary source. CBSE question papers are written directly from NCERT.

NCERT reading technique: Read actively — do not skim. Underline definitions, key terms, and bold/italicised words on first read. On second read, write brief margin notes. On third read (close to exams), read just the underlined parts. Every diagram in NCERT is exam-ready — learn them with labels.

NCERT Examples and Exercises: Every solved example in NCERT Maths and Physics is a potential board question. Every exercise question has appeared in board papers, often verbatim. Solve all of them.

NCERT Exemplar: A step above NCERT, aimed at students targeting 90%+. Especially useful for Maths, Physics and Chemistry. Solve at minimum the MCQ and short-answer sections.

Answer Writing Technique

Board examiners mark thousands of papers — they are not reading your answer for pleasure. They are checking for keywords, structure and completeness.

For theory questions: Start with a one-line definition or statement. Use bullet points or numbered steps for process-based answers. End with an example or application where relevant. For 3-mark and 5-mark questions, use headings to separate parts.

For diagram-based questions: Draw neatly in pencil with clear labels. Use a ruler for straight lines. Give the diagram a title. Arrows on diagrams (e.g., direction of current) must be clear.

For numerical problems (Maths, Physics, Accounts): Write the formula first. Substitute values with units. Show each step — partial marks are awarded if the method is correct even if the final answer is wrong. Box or underline the final answer.

Time management in the exam: For a 3-hour, 80-mark paper: spend 15 minutes reading and planning. Attempt all MCQs first (they are low-effort, high-yield). Then move to 3-mark and 5-mark questions from your strongest chapters. Revisit long answers last.

Revision Strategy That Works

Spaced repetition: Do not re-read full chapters each time. After first read, review in 1 day, then 1 week, then 1 month. Each review is faster than the last and embeds memory deeply. Use small revision cards (digital or physical) for formulas, definitions and dates.

Solve previous years' papers: Solve the last 10 years of board papers for each subject. This is the highest-ROI activity in the last 3 months before boards. You will start seeing patterns — certain question types repeat. For CBSE, papers from 2015 to 2025 are available on cbse.gov.in and various study platforms.

Mock tests under exam conditions: At least once a week in the last month, sit a full paper in exactly 3 hours with no interruptions. Evaluate your own paper using the marking scheme. Identify errors — silly mistakes, presentation gaps or knowledge gaps — and fix each category separately.

The Week Before and Exam Day

Final week: Do not start new topics. Only revise from your notes. Solve one paper per day. Get 7–8 hours of sleep every night — sleep consolidates memory more than late-night studying.

Exam morning: Eat a proper meal. Reach the exam hall 15–20 minutes early. In the reading time (first 15 minutes), read the full paper. Mark easy questions you will do first. Identify long or complex questions and estimate time.

During the exam: If you get stuck on a question, move on and return. Do not spend 10 minutes on a 2-mark question. Keep track of time — check your watch every 30 minutes. Attempt every question — there is no negative marking in CBSE boards.

Presentation matters: Clean paper, readable handwriting, numbered answers, ruled diagrams. Examiners subconsciously give higher marks to well-presented papers — this is well-documented.