Hi Sir,
You just need a informative static website for your school, so that people can browse or you want them to register, signup or sign in and do other activities also? Static will be one time site, where you won't be able to change the contents yourself.
If you wish to be able to change your contents yourself you will need CMS based website. If you want this it will take more time and price. Please let me know your decisoin, or come online for chat. The price will change upon your decisoin.
Regards,
Naval