Should Schools Have Unlimited Access To Websites?

The boom in the internet technology is making the access to knowledge and information easier but at the same time there are some problems which internet technology can create as well. In schools I think, unlimited access to websites should not be there. Kids are innocent and in the schooling age they are not aware of the right use of internet. Therefore, in order to keep a restriction on students and to avoid their access to chat rooms and pornography material, a limited access to internet is very necessary.