ISC Class 12 Exam Pattern 2027: Marking Scheme, Papers and Grading

The ISC Class 12 exam pattern explains how many subjects you will write, how marks are divided between theory and internal work, how long the papers are and what you need to pass. Knowing this structure early lets you practise in the right format rather than only reading chapters. This page is based on the CISCE regulations for the ISC examination; confirm any change for your exam year on cisce.org.

Table of Contents

ISC Class 12 Exam Pattern

Subject Choices and Combinations

You take English as the compulsory subject and choose four or five electives from the list your school offers. Some combinations are not permitted.

• Not allowed together: English with Modern English; Physics with Engineering Science; Geometrical and Mechanical Drawing with Building Drawing; Mathematics with Applied Mathematics; Robotics with Artificial Intelligence.

• Continuity: You cannot take a subject in Class 12 that you did not study in Class 11.

• Change deadline: Subject changes are not allowed after 15 September of the year in which you were registered in Class 11.

• Practical subjects: If a subject has a practical examination, you must take it, otherwise the examination in that subject is considered incomplete.

Theory and Practical Marks

The marks split is set in each subject syllabus and can be revised, so treat this table as a planning guide and confirm it in the current document for your subject.

Paper Duration and Question Structure

Theory papers are three hours long. Most papers are divided into sections, with some compulsory questions and some choice. The reading time is printed on the question paper, and you can use it to read the paper and plan your order of attempts.

The number of questions, choices and marks per question is decided by CISCE for each subject, so always check the latest paper design.

Practical, Project and Internal Assessment

Practical and project marks are awarded by your school and moderated by the board. Practical marks from the main examination are carried forward to the improvement examination unless you were absent.

• Science subjects: Practical examination, project work, practical file and viva.

• Computer Science: Practical examination that tests programming skills.

• Mathematics and Commerce subjects: A project or assignment as prescribed.

• English: Internal assessment such as listening and speaking tasks.

Pass Marks, Certificate Conditions and Grades

The pass mark for each subject is 35 per cent. The pass certificate is awarded to candidates who reach the pass standard in five or six subjects, which must include English or Modern English, and who have a pass grade in Socially Useful Productive Work (SUPW).

SUPW is graded from A to D for a pass and E for a fail. In long answers and numericals, marks are usually given for the method and steps as well as the final answer, so show your working.

Difficulty Level

Difficulty depends on the subject and your preparation. Physics, Chemistry and Mathematics are often seen as demanding because of numericals and derivations, Biology needs accurate terminology and diagrams, and Accounts needs speed and correct formats. CISCE does not publish a difficulty rating, so use your own test scores as the best guide.

Exam-Day Rules

• Permitted items: Blue or black ink pens, pencils, scale, eraser, coloured pencils and drawing instruments.

• Calculator: A scientific calculator such as Casio fx-82 MS or equivalent, without information-retrieval features, where the syllabus allows.

• Prohibited items: Textbooks, notes, chits, smart watches, mobile phones, wallets and sharp objects.

• Penalties: Use of unfair means can lead to cancellation of results in a subject or in the examination as a whole.

Recheck, Re-evaluation and Improvement

You can apply for a recheck within four days from the day results are declared. Re-evaluation can be requested within three days from the declaration of the recheck results, and re-evaluation charges are non-refundable. An improvement examination is available in a maximum of two subjects. You must appear in the theory paper, the higher of the two marks counts, and registration is done in June or July. Candidates who do not qualify can reappear once in the next year, without attending school, in all original subjects.

Paper-Wise Strategy

How to Prepare According to the Exam Pattern

1. Practise full three-hour papers: Build stamina and check how you spread time across sections.

2. Secure internal marks early: Complete files and projects and prepare for viva.

3. Use the reading time: Mark strong questions and plan your order.

4. Show every step: Working earns marks even if the final answer is wrong.

5. Review every test: Separate concept gaps from careless mistakes.

6. Do not ignore English: It is required for the pass certificate.