Hi, welcome to the site. This criteria relies on your research and knowledge of what schools are all about, why they exist, what they aim to do, who for and how ie. what goes on as an organistation.
It also relates direcly to your sschool setting as, although it will be compliant with legislation and regulation, it'll have its own view on how things are expected to happen - ethos, what the short and long term objectives are - mission and aims, and what it holds as most important - values.
http://www.silkysteps.com/forum/showthread.php?t=15207
Ask your school for a copy of it's prospectus, staff handbook and any statment statment of intent that it promotes to see what they say xx
Support teaching and learning level 3 primary handbook on amazon.co.uk
Types of schools on gov.uk and
roles & responsibilities thread
Best wishes