Education CMS

Hello,
Please I am in need of a WordPress CMS for a high school. The CMS should be able to do the following:
Publish Result and Marks through your School website.
Do assignment and work by using web-school facilities
Keep school contact details and calendar events up to date
Create individual user accounts for parents, teachers, staff and children to control access to areas of the site
And Many other necessary functions of a school websiste.

Please suggest a premium theme I can use to achieve this or a plugin. Thank you