You may need to book or reserve a room, or a resource in the school. This may be the Flexispace, Auditorium, Sports Hall, etc. To add or book a resource into your Google Calendar, please follow the steps in the link below.
https://drive.google.com/file/d/1Ki6W46KUfxXAVHAJOAHWSDukhysWqX4O/view?usp=sharing