To gain admission to DAV School in Class 11 as a PCMB (Physics, Chemistry, Mathematics, and Biology) student, follow these steps:

1. **Eligibility**: Ensure you meet the basic eligibility criteria, which typically include a minimum percentage in Class 10 exams. For science streams, most DAV schools require at least 75%-85% in subjects like Mathematics and Science. Each branch may have its own cutoff.

2. **Application Process**:

- Visit the official website of the DAV school you are interested in or visit the school premises.

- Obtain the admission form, either online or from the school’s office.

- Fill out the form with accurate personal details, marks obtained in Class 10, and stream preference (PCMB).

3. **Entrance Exam/Interview**: Many DAV schools conduct entrance exams for admission to Class 11, particularly for science streams. Prepare for these exams by revising key topics in Science and Mathematics from Class 10.

4. **Submission of Documents**: Submit required documents such as the Class 10 marksheet, school leaving certificate, transfer certificate (if applicable), and passport-sized photographs.

5. **Merit List**: Admission is typically merit-based. After applying, the school will publish a merit list or call for an interview based on your marks and entrance exam performance.

6. **Final Admission**: Once selected, complete the necessary formalities like fee submission and document verification for final admission.

Ensure to stay updated with the deadlines and guidelines of the specific DAV branch you're applying to.