Most Class 10 students treat the half-yearly exam as a low-stakes practice round — something to get through before the "real" preparation begins closer to boards. This year, that assumption is worth reconsidering. Since the 2025–26 session, CBSE has run Class 10 board exams under a genuinely new structure: a two-phase scheme (a mandatory Phase 1 plus an optional Phase 2 improvement attempt), with each subject's paper split across five sections testing MCQs, short answers, long answers, and case-based questions — roughly half the paper now competency-based rather than pure recall.
Many CBSE schools have started designing their half-yearly papers to mirror this exact five-section format. If your school is one of them, your half-yearly isn't just a syllabus checkpoint — it's your first real rehearsal of the actual exam structure you'll face for real in February. This guide covers what the half-yearly typically tests, why it matters more than students usually assume, and a full 30-day, subject-wise preparation plan.
⚠️ A quick, important clarification
Half-yearly exams are set and conducted by your individual school — not by CBSE centrally. There is no official CBSE half-yearly datesheet or national marking scheme. Schools typically follow the CBSE curriculum and set their own papers in-house, usually somewhere in the mid-September to mid-October window. This guide uses CBSE's official 2025–26 curriculum structure (largely unchanged going into 2026–27) and the realistic patterns most schools follow — but always confirm your exact dates, syllabus portion, and paper format with your own school's circular.
Why This Year's Half-Yearly Is Different — The Five-Section Format
The CBSE Class 10 two-examination scheme was announced in February 2025 and implemented from the 2025–26 academic year, and continues into 2026–27. Each subject's theory paper carries 80 marks (plus 20 for internal assessment), structured across five sections:
MCQs
Objective, 1 mark each
Very Short Answer
2 marks each
Short Answer
3–4 marks each
Long Answer
5 marks each
Case-Based
Passage/data + questions
Roughly half the paper is now competency-based — case studies, source-based questions, and application-type problems rather than direct recall. If your half-yearly follows this same structure, treat it as genuine rehearsal: practising the actual pacing across five different question types under real time pressure is a skill in itself, separate from knowing the content.
What the Half-Yearly Typically Covers
Since half-yearly exams conventionally cover roughly the first half of the year's syllabus, here's what that commonly includes based on CBSE's official Class 10 curriculum structure — confirm your school's exact portion, since this varies:
Commonly: Real Numbers, Polynomials, Pair of Linear Equations
These are typically the first three chapters taught and the most likely half-yearly portion. Real Numbers and Polynomials each carry meaningful weightage in the full-year paper — building them solidly now saves revision time before boards.
Commonly: Chemical Reactions, Acids/Bases/Salts, Life Processes
The Class 10 Science paper spans Physics (25 marks), Chemistry (25 marks), and Biology (30 marks) across the full year. The half-yearly typically draws from the earlier Chemistry and Biology chapters taught first in most school timetables.
Commonly: early History and Geography units
Social Science splits into History, Geography, Political Science, and Economics, each carrying roughly equal weight across the full year. The half-yearly typically covers the first unit or two of History and Geography, including introductory map work.
Commonly: early prose/poetry sections + grammar
English coverage is usually the first few literature sections plus foundational grammar and writing skills — reading comprehension, letter writing, and the early chapters of the prescribed reader.
The 30-Day Framework — How to Split Your Time
Weight your time toward Mathematics and Science — both are numerical- and diagram-heavy, and both reward consistent daily practice far more than last-minute reading. Social Science needs dedicated time specifically for map work, which is a distinct skill from content recall. English needs steady, spread-out practice.
Adjust based on your own school's exact syllabus portion — this is a starting framework built for a typical five-subject split.
Week-by-Week Plan
Maths & Science Foundation
- Cover Real Numbers, Polynomials, and early Linear Equations with full worked examples
- Cover Chemical Reactions and Acids/Bases/Salts, practising every named reaction
- Build a running formula sheet as you go — don't leave it for later
Continue + Start SST & English
- Finish remaining Maths and Science chapters in your syllabus portion
- Start History and Geography, including specific map-work practice
- Begin daily English writing and grammar practice, 20 minutes minimum
Full Coverage + Format Practice
- Complete first full pass across all four subjects
- Practise Section A (MCQ) blocks under strict time limits
- Practise at least one Section E case-based question per subject
Timed Mocks + Final Revision
- Attempt at least one full timed paper per subject, five-section format
- Revise formula lists, named reactions, and map locations — not new content
- Review every mock mistake and reattempt those specific questions
Subject-Wise Priorities
Mathematics
Algebra carries the highest weightage in the full-year paper, so Polynomials and Pair of Linear Equations — likely half-yearly chapters — deserve full attention now, not a rushed pass. Show every working step; step marking rewards this even in mid-year exams, and building the habit now pays off at boards.
~8 days recommendedScience
Practise writing balanced chemical equations for every reaction type, not just recognising them. For Biology, diagrams matter — a correctly labelled diagram can rescue a partially complete answer. Don't skip numerical questions in Physics chapters if they fall within your portion.
~8 days recommendedSocial Science
Map work is a distinct skill from content knowledge — practise locating and marking specific features on outline maps repeatedly, not just reading about them. Build timelines for History chapters and practise short, precise answers rather than long paragraphs for definition-style questions.
~7 days recommendedEnglish
Practise the specific writing formats you'll be tested on — formal and informal letters, analytical paragraphs — rather than generic essay writing. Reading comprehension improves with regular timed practice more than with passive reading.
~5 days recommendedThe Mistakes Students Make Preparing for This Half-Yearly
Treating it as low-stakes and under-preparing
The half-yearly typically counts as one of your periodic tests — worth real marks within your internal assessment — and if your school mirrors the board format, it's also your first genuine test of exam-day pacing across five sections.
Only revising content, never practising format
Knowing Real Numbers doesn't automatically mean you can answer a Section E case-based question about it under time pressure. Practise the question types specifically, not just the content.
Skipping map work until "closer to boards"
Map work is a skill that degrades quickly without regular practice. Doing it consistently from Week 2 onward is far more effective than a single intensive session before the exam.
Your Half-Yearly Score Is a Preview. Here's How to Read It Correctly.
A half-yearly score of 62 out of 100 in Maths tells you almost nothing useful on its own. What matters is the breakdown underneath it — which chapters are solid, which need work, and whether errors are conceptual, calculation-based, or format-related (running out of time in a specific section, for instance).
What a Genelis weak area map looks like after a Class 10 half-yearly
Next session: map work (38%) — not Real Numbers (85%). Directed by data, not comfort. Genelis builds this map automatically after every practice session and mock paper.
Genelis is an AI-powered personalized learning platform built on Adaptive Personalized Intelligence. The Genelis learning system tracks your accuracy chapter by chapter, distinguishing conceptual gaps from calculation errors and format-related time pressure. Every wrong answer is logged to your wrong-question notebook and queued for reattempt — so the months between your half-yearly and your board exam are spent closing real gaps, not re-covering what's already solid.
Your 30-Day Half-Yearly Checklist
| Days | Focus | Goal by end of block |
|---|---|---|
| Day 1–8 | Mathematics | Portion chapters covered with full worked examples, running formula sheet started |
| Day 9–16 | Science | All portion chapters covered, equations balanced, diagrams practised from memory |
| Day 17–23 | Social Science | Content read, timelines built, map-work practice started and repeated |
| Day 24–28 | English + weak-area revisit | Writing formats practised, grammar revised, weakest topics across all subjects revisited |
| Day 29–30 | Full mixed revision + 1 timed five-section mock | At least one full paper attempted under real exam-day time pressure |
Learn smarter. Practice deeper. Improve continuously.
Genelis combines Adaptive Personalized Intelligence, AI-generated notes, targeted practice, mock tests, analytics, and personalised revision to help students improve every study session.
Questions Students Commonly Ask
Quick answers to the most common questions related to this guide.
Is the Class 10 half-yearly exam conducted by CBSE?
No. Half-yearly exams for Class 10 are set and conducted by individual CBSE-affiliated schools, not by CBSE centrally. There is no official CBSE half-yearly datesheet or national marking scheme published. Schools typically follow the CBSE curriculum and set their own papers in-house, usually in the September to mid-October window. Confirm exact dates, syllabus portion, and weightage from your own school's circular.
How does the half-yearly relate to the actual Class 10 board exam?
Since the 2025-26 session, CBSE Class 10 board exams follow a two-phase scheme: a mandatory Phase 1 exam and an optional Phase 2 improvement exam, with the better score counting on the final marksheet. Each subject's theory paper is structured across five sections (A to E) covering MCQs, very short answer, short answer, long answer, and case-based questions, with roughly half the paper being competency-based. Many CBSE schools now design their half-yearly papers to mirror this same five-section, competency-based format, making the half-yearly genuine practice for the real exam structure rather than just a syllabus checkpoint.
What syllabus does the Class 10 half-yearly exam typically cover?
Half-yearly exams conventionally cover roughly the first half of the year's syllabus, though the exact chapter list is set by each school individually. Based on CBSE's official Class 10 curriculum, this commonly includes early units such as Real Numbers, Polynomials, and Pair of Linear Equations in Maths; Chemical Reactions and Acids, Bases and Salts in Chemistry; Life Processes in Biology; and the first History and Geography units in Social Science. Always confirm your school's specific portion, since coverage varies.
How much does the half-yearly count toward my final Class 10 marks?
Class 10 follows an 80 marks theory plus 20 marks internal assessment structure per subject. Within that 20 marks, Periodic Assessment typically carries 10 marks, based on the average of the best 2 of 3 periodic tests through the year. In most schools, the half-yearly is treated as one of these periodic tests, giving it real, direct weight on your internal assessment score in addition to its value as board exam practice. Confirm the exact weighting with your own school.
How should I divide 30 days of preparation across Class 10 subjects?
Weight your time toward Mathematics and Science, since both are numerical- and diagram-heavy and reward consistent daily practice over last-minute reading. A reasonable 30-day split is roughly 8 days Mathematics, 8 days Science, 7 days Social Science (including dedicated map work practice), 5 days English, and 2 days for full mixed revision and a timed, five-section mock paper that mirrors the actual board format.