Student blogs

Question

How to create student blog using ASP.net(c# language)

In that following features how to do please explain if u have please send to my mail id.

1)Security--------for example if student should not update bad videos and images to my site it should be full security
2)Create student blog in which he can access to a particular class /grade videos for example if the student is in 6-10th class he need to access that particular tenth class videos only he should not aceess unauthorised videos tat means he should not access 1-5th class videos or other videos so class grades should be divide in 1-5th,6-10th,higher educational