Every year, after CBSE board exams end, the board publishes a document on its official website. It is the exact answer key every examiner is handed before they start marking papers. It lists the precise keywords, sub-points, and diagrams required for every question — and how many marks each part carries.
Almost no student ever reads it. Here is what is inside.
What the Document Actually Looks Like
The CBSE marking scheme is a PDF, one per subject. It mirrors the question paper exactly — every question has a corresponding answer with marks broken down to the sub-part level. The examiner sitting with your paper has this document open next to them. They are not forming an opinion about your answer. They are checking whether specific elements are present.
- Each question has a model answer with the exact wording CBSE expects
- Marks are split into sub-parts — 1+1+1 for a 3-marker, for example
- Alternative acceptable answers are listed where multiple phrasings are valid
- Diagrams required are drawn out with mandatory labels marked clearly
- Instructions to examiners say things like: 'Award 1 mark if student writes X. Do not award if student only writes Y.'
Why Students Lose Marks They Should Not
This is the part most students find surprising. The examiner is not reading your answer for understanding. They are scanning for specific words and points. If those words are not there, the mark is not given — even if your answer is conceptually correct.
| Subject | What Student Wrote | What Marking Scheme Required | Marks Awarded |
|---|---|---|---|
| Science | Resistance does not change when the wire stays cool | 'Resistance remains constant at constant temperature' | 0 out of 1 |
| Social Science | The government takes over private companies | 'Nationalisation — transfer of ownership from private to government' | 0 out of 1 |
| Maths | x = 4 (final answer only) | Step 1: equation formed correctly (1m) + Step 2: simplification (1m) + Step 3: answer (1m) | 1 out of 3 |
| Science | Drew correct circuit diagram, no labels | Diagram with all components correctly labelled (1m) | 0 out of 1 |
Tip
The marking scheme does not care how much you know. It cares whether your answer contains the exact keywords and structure it is looking for. A student who knows 80% of the syllabus but writes with marking-scheme awareness will consistently outscore a student who knows 100% but writes in their own words.
Subject-Specific Patterns That Appear Every Year
Maths
- Marks are awarded per step — not just for the final answer
- A correct step after a wrong step still earns its mark
- Forgetting units (cm, m², kg) on a final numerical answer loses the last mark
- Constructions must show arcs and construction lines — a clean figure without them gets zero
Science
- Diagrams are mandatory for Biology answers — no diagram means no marks for that sub-part
- Chemical equations must be balanced — an unbalanced equation is marked wrong even if the reactants and products are correct
- Physics numerical answers must show the formula first, then substitution, then calculation
- Keywords like 'directly proportional', 'inversely proportional', 'rate of reaction' cannot be substituted with informal phrasing
Social Science
- Named examples are mandatory — 'a country in Europe' earns nothing, 'Belgium' earns the mark
- Dates and proper nouns (Acts, Treaties, Leaders) are often the keywords being checked
- 5-mark answers that are written as one paragraph instead of numbered points are penalised for structure even if the content is correct
How to Use This for the Improvement Exam
The marking scheme for this year's Class 10 exams will be published on the CBSE website shortly after results are declared. When it drops, do this one exercise before the improvement exam: take the questions you struggled with in your first attempt, write new answers, then compare them line by line against the marking scheme. This single exercise will show you exactly where your marks went and what to change.
- 1.Download the marking scheme PDF for your subject from cbse.gov.in
- 2.Attempt the questions you want to improve — on paper, timed
- 3.Open the marking scheme and compare your answer to the model answer point by point
- 4.Circle every keyword in the model answer that is missing from yours
- 5.Rewrite the answer using those exact keywords and structure
- 6.Repeat for every question in the subjects you are improving
Tip
You do not need to study the whole syllabus again. You need to study how to write the answers you already know. The marking scheme tells you exactly what that looks like.