1. Visit the official website of the National Cyber Olympiad (NCO).
2. Click on the "Register" tab.
3. Select "School Registration" from the drop-down menu.
4. Enter the required details such as school name, address, city, state, and pin code.
5. Click on the "Submit" button.
6. You will receive an email containing the school code and login credentials.
Please note that the school codes for the 7th National Cyber Olympiad may vary from year to year. Therefore, it is always best to check the official website of the NCO for the most up-to-date information.