CBSE practical exams for 2026-27 are reported to be held in November to December 2026 for winter-bound schools and in January to February 2027 for other schools, and they carry marks that add directly to your board result in subjects such as science, computer science, physical education and others with a practical component. Your school decides the exact dates, and an external examiner may be appointed as per CBSE rules. This guide explains how the practical component works in general, how to prepare your practical file and project, what viva questions to expect, how to practise experiments and how to avoid common mistakes. Marks distribution differs by subject, so check your school’s notice and the official CBSE curriculum. See also our CBSE date sheet 2027 guide.
Last Checked: 2 November 2026
Education portals report that practical exams for winter-bound schools may be conducted in November and December 2026, while other schools may conduct them from January to February 2027. The exact dates are not published for all schools, so follow your school’s circular and the official CBSE notices.
How Practical Marks Usually Work
| Component | What it includes | Notes |
|---|---|---|
| Theory paper | Written board exam | Carries the larger share of marks |
| Practical or internal assessment | Experiments, practical file, project, viva and attendance or activities | Marks are uploaded by the school as per CBSE rules |
| External examiner | Appointed in some subjects as per CBSE rules | Check your school notice |
| Subject-specific components | Examples: practical test, portfolio, project or oral test | Differ by subject |
In many science subjects, practical or internal assessment has been a significant part of the total marks. Check the subject-wise scheme in the official curriculum.
Common Parts of a Practical Exam
- Performing an assigned experiment or activity
- Recording observations and calculations
- Practical file submission
- Project work or investigatory project
- Viva voce with questions on theory, procedure and safety
- Internal assessment through activities and regular classwork
Marks are usually given for each part, so do not neglect any section.
How to Prepare Your Practical File
- Use the format given by your teacher and arrange experiments in order.
- Write aim, apparatus, theory, procedure, observations, calculations, result and precautions neatly.
- Draw clear, labelled diagrams with a pencil and use a ruler.
- Write results correctly with units and significant figures.
- Get teacher signatures and dates on each page.
- Keep an index at the start and a certificate page as required.
A neat, complete file shows that you understand the work. Do not copy blindly from friends, because examiners can notice mismatched observations.
Subject-Wise Practical Tips
Science (Physics, Chemistry, Biology)
Practise each experiment at least twice, learn the principle, formulas and precautions, and note common sources of error. In chemistry, remember the colour changes and tests for ions or organic functional groups as given in your syllabus. In biology, practise preparing slides, drawing diagrams and identifying specimens. In physics, practise taking readings and plotting graphs neatly.
Computer Science and Informatics Practices
Practise programs and database queries without looking at notes. Know the logic behind each program, handle errors and keep your practical record updated. Be ready to explain output and modify the program if asked.
Physical Education and other subjects
Practise the required activities, keep your records or portfolio complete and learn the rules, terms and basic theory linked to the practical. Prepare to answer short oral questions confidently.
Viva Voce: How to Answer Well
- Listen to the full question before answering
- Use simple, clear sentences and technical terms from your syllabus
- If you do not know, say you are not sure and explain what you do know
- Be calm and polite and avoid guessing wildly
- Revise safety rules, apparatus names and basic definitions
Sample viva questions often ask why you chose a particular method, what precautions you took and what the result shows.
Investigatory Project and Portfolio Tips
Choose a topic you understand and can explain. Plan your steps, collect data honestly and present results with tables, charts and conclusions. Be ready to explain your methods, why you chose the topic and what you learned. Include acknowledgements and a bibliography, and avoid copying a project from the internet. A simple project done honestly gets better marks than a complex one you cannot explain.
Attendance, Discipline and Internal Assessment
Regular attendance in practical classes and consistent performance in activities support your internal marks. Follow lab safety rules, submit assignments on time and keep your file updated. If you miss a practical, ask your teacher for a make-up session immediately.
Common Mistakes
- Leaving the file incomplete until the last week
- Memorising answers without understanding
- Not practising experiments in the lab
- Ignoring safety and precautions
- Copying projects without understanding
- Arriving late or without required materials
Sample Viva Questions by Subject
| Subject | Sample questions | How to answer |
|---|---|---|
| Physics | What is the least count of the instrument? Why do we take more than one reading? | State the definition and the reason in one or two sentences |
| Chemistry | Why do we use indicators in titration? What precautions did you take? | Link to the principle and safety steps |
| Biology | Which part of the slide shows the structure? What is the function of this part? | Point to the structure and explain its role simply |
| Computer Science | What does this line of code do? What if the input changes? | Explain the logic and mention how output changes |
| Physical Education | Why is warm-up important? Which rule applies in this game? | Give a short, clear reason |
Practise these types of questions aloud with a friend. The aim is to explain your work clearly in simple words.
A Four-Week Plan to Complete Your Practical Work
| Week | Tasks | Outcome |
|---|---|---|
| Week 1 | Complete pending experiments and observations | All activities done and checked by the teacher |
| Week 2 | Write and draw the practical file neatly | File complete with diagrams and signatures |
| Week 3 | Finish project and portfolio, make a short presentation | Project ready to explain |
| Week 4 | Revise viva, practise two or three key experiments | Confidence for the exam day |
If your practicals are close, compress this plan by working a little every day. Ask your teacher for help with experiments that you find difficult.
What to Carry on the Day of the Practical
- School ID and admit card or slip as instructed
- Practical file, project and portfolio
- Pen, pencil, ruler, eraser and any allowed instruments
- Lab coat if required by the school
- A calm mind and a polite attitude
Reach early, listen to instructions and ask politely if you do not understand something.
How Parents and Teachers Can Help
Parents can help by keeping a schedule for completing the file and project, arranging a quiet place for study and checking that the student has all required materials. Teachers can guide on experiment steps, file format and viva practice. If a student is nervous, a mock viva at home or school can reduce stress. Encouragement and regular practice work better than last-minute pressure.
Lab Safety Rules You Should Always Follow
- Wear protective clothing, gloves or goggles when the experiment needs them
- Never taste or smell chemicals directly unless the teacher instructs
- Keep your work area clean and dispose of waste as directed
- Handle glass apparatus and flames carefully
- Report spills, breakages or injuries to the teacher immediately
- Wash hands after the practical
Examiners often watch how you work, not only the final result. Safe handling and tidy work habits show that you understand the experiment. Make a habit of reading the steps once before you start and arranging apparatus in order.
Quick Revision List for the Last Two Days
- Read your file once from the first experiment to the last
- Revise the principle and precautions of two or three major experiments
- Practise your project explanation in two minutes
- Recall the definitions and formulas linked to your practicals
- Pack your bag and sleep early
Do not try to learn new experiments at the last minute. Focus on understanding and presenting what you have already done with care.
Using Technology Wisely for Practical Learning
Videos and simulations can help you understand experiments, but they cannot replace hands-on practice in the lab. Use them to see the steps before you perform the experiment, and to revise the principle afterwards. For computer practicals, practise on a computer and write the program yourself instead of copying. Keep your notes and files backed up, and never submit work that you cannot explain.
Final Thoughts
Practical marks can strengthen your overall score if you prepare early. Complete your file, practise experiments, prepare for viva and finish your project honestly. Follow your school’s instructions and the official CBSE notices, and keep calm on the day. See the CBSE category for more board exam guides.
Frequently Asked Questions
When are CBSE practical exams 2026-27?
Reports say November to December 2026 for winter-bound schools and January to February 2027 for others. Your school will confirm.
Do practical marks add to board marks?
Yes, in subjects with a practical component, marks are added as per the CBSE scheme.
What should I include in the practical file?
Aim, apparatus, theory, procedure, observations, calculations, result and precautions, with diagrams where needed.
Is there an external examiner?
In some subjects, as per CBSE rules. Check your school notice.
What is a viva voce?
An oral test where the examiner asks questions about the experiment, theory and safety.
Can I redo a practical if I miss it?
Ask your teacher and school immediately. Rules depend on CBSE and the school.
How should I prepare for viva?
Revise the principle, steps, formulas and precautions of each experiment and practise answering aloud.
What is an investigatory project?
A student-designed study on a topic with data, analysis and conclusions, as guided by the school.
Can I copy my file from a friend?
No. Prepare your own file, because examiners may ask questions about your observations.
Do computer science students have practicals?
Yes, usually programming and database practicals with a record or file.
What if my school has no lab?
CBSE affiliation requires labs for relevant subjects. Raise the issue with your school and follow official guidance.
Where can I see the official marking scheme?
On the official CBSE academic website for the curriculum of your subject.
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