Home Exams CBSE Class 12 Board Exam 2027Streams and Subjects

Streams and Subjects

Updated 17 Oct 20263 topics

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Science, Commerce and Humanities Streams Subject Combinations and Additional Subject Marks Distribution: Theory, Practical and Internal Assessment

Science, Commerce and Humanities Streams

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CBSE does not formally divide Class 12 into “streams” — students choose subjects from the Scheme of Studies. In practice, most students follow one of three popular groupings.

Popular Subject Groupings

Stream	Typical subjects	Common next steps
Science – PCM	English, Physics, Chemistry, Mathematics + one more	Engineering (JEE Main / Advanced, state CETs), architecture (NATA), B.Sc.
Science – PCB	English, Physics, Chemistry, Biology + one more	Medicine (NEET UG), pharmacy, life sciences
Commerce	English, Accountancy, Business Studies, Economics + Mathematics or another subject	B.Com, BBA, CA/CS/CMA, economics
Humanities	English + History, Political Science, Geography, Psychology, Sociology, etc.	BA, law (CLAT), journalism, design, liberal arts

Skill and Interdisciplinary Subjects

CBSE also offers skill subjects such as Artificial Intelligence, Data Science, Information Technology and others, which can be taken as one of the subjects or as the additional sixth subject.

Key Takeaways
CBSE has no fixed streams — you choose subjects within valid combinations.
PCM, PCB, Commerce and Humanities are the most common groupings.
Skill subjects like AI and Data Science are also available.

Pro Tip: Check the subject requirements of the entrance exams you plan to take — for example, Mathematics is required for B.FTech at NIFT and Physics + Maths for engineering.

Source: CBSE Curriculum 2026-27 (Scheme of Studies)

Frequently Asked Questions

Does CBSE have fixed streams in Class 12?

No. Students choose subjects from the Scheme of Studies; Science, Commerce and Humanities are common groupings.

Can Commerce students take Mathematics?

Yes, Mathematics is a popular choice in Commerce combinations.

Can I take a skill subject like AI in Class 12?

Yes. Skill subjects such as Artificial Intelligence and Data Science are offered, subject to school availability.

CBSE streamsCBSE Class 12 subjects

Subject Combinations and Additional Subject

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CBSE Class 12 students take five main subjects and may take an optional sixth (additional) subject. The rules below are from the CBSE Curriculum 2026-27.

Subject Structure

Subject slot	Rule
Subject 1	A language — Hindi or English
Subjects 2 to 5	Electives or another language, as per valid combinations
Subject 6 (optional)	Additional subject — any elective, language or skill subject
Internally assessed	Health and Physical Education, Work Experience and General Studies

How the Additional Subject Helps

As per the curriculum, the first five subjects registered are treated as the main subjects. If a student fails in one of the main subjects, the additional subject can replace it, provided Hindi or English remains among the five subjects counted.

Valid Combinations

Schools must offer subjects according to the Scheme of Studies; invalid combinations are not accepted.
Subjects involving laboratory work need CBSE approval for the school.
Subject changes are not allowed after LOC submission, except in transfer cases.

Key Takeaways
Five main subjects + one optional additional subject.
One subject must be Hindi or English.
The additional subject can replace a failed main subject (with the language condition).

Pro Tip: Choosing an additional subject you enjoy can act as a safety net — it can replace a main subject if needed.

Source: CBSE Curriculum 2026-27 (cbseacademic.nic.in); CBSE LOC circular 2026-27

Frequently Asked Questions

Is a sixth subject compulsory in CBSE Class 12?

No. The sixth (additional) subject is optional.

Can the additional subject replace a failed subject?

Yes, as per the curriculum, provided Hindi or English remains among the five subjects.

Is English compulsory in CBSE Class 12?

One of the five subjects must be a language — Hindi or English.

CBSE additional subjectCBSE subject combination

Marks Distribution: Theory, Practical and Internal Assessment

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Most CBSE Class 12 subjects are marked out of 100, split between a written theory paper and practical work or internal assessment. You must pass both parts separately.

Theory and practical marks distribution in CBSE Class 12

Marks Split by Subject Type (CBSE Curriculum 2026-27)

Subject type	Theory	Practical / internal assessment
Languages (e.g., English, Hindi)	80	20
Economics	80	20
Physics, Chemistry, Biology	70	30
Geography	70	30
Most skill subjects	60	40
Artificial Intelligence, Data Science, Yoga	50	50

For subjects not listed here, refer to the subject-wise curriculum on cbseacademic.nic.in.

What Practical / Internal Assessment Includes

Lab experiments, viva and practical records (science subjects).
Projects and investigatory work.
Listening and speaking assessment (languages), as specified.

Key Takeaways
Science subjects: 70 theory + 30 practical.
Languages and Economics: 80 theory + 20 internal assessment.
AI, Data Science and Yoga: 50 + 50.

Pro Tip: Practical and internal assessment marks are easier to score — complete projects and records on time and prepare for the viva.

Source: CBSE Curriculum 2026-27 (cbseacademic.nic.in)

Frequently Asked Questions

How many marks are for practicals in CBSE Class 12 Physics?

30 marks, with 70 marks for theory.

Do I need to pass theory and practical separately?

Yes. You must pass both components separately.

How are AI and Data Science marked?

50 marks theory and 50 marks practical, as per the 2026-27 curriculum.

CBSE practical marksCBSE internal assessment

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