1st amendment rights in the USA are analogous to Article 7 of the Human Rights Act.
That is the USA, with a completely different legal system to the UK.
The original US 1st Amendment is as follows:
The EU Human Rights Act Article Ten is as follows:
Congress shall make no law respecting an establishment of religion, or prohibiting the free exercise thereof; or abridging the freedom of speech, or of the press; or the right of the people peaceably to assemble, and to petition the Government for a redress of grievances.
So actually, the EU version is broader than the US one due to the use of 'expression' rather than 'speech'. Now, I'm not blaming anyone for not being familiar with these laws. We've only had them for ten years or so and their full effect has not been realised.
Everyone has the right of freedom of expression. This right shall include freedom to hold opinions and to receive and impart information and ideas without inference by public authority and regardless of frontiers. This Article shall not prevent States from requiring the licensing of broadcasting, television or cinema enterprises.
Clearly I'm not explaining myself very well.
It is not infringing on rights - you have still not shown what rights would be infringed by restricting a luxury which is there for education.
I agree with you that in school grounds or during school hours or when using school equipment then the school has the unquestionable ability to revoke pupils ability to use computers, the internet, email, the bathroom, chairs, shoelaces, left handed doors or whatever else the school feels is appropriate punishment. The ultimate punishment being exclusion/expulsion from school.
However off school grounds, out of school hours, or when not using school equipment none of these measures can be applied. Indeed, the school has no authority to do so. It's not a police force and shouldn't try to be one.
For example, you cannot say "Anyone who uses MySpace, Facebook or BeBo in school or at home will be suspended". You can't do this because Article 10 doesn't allow it. The school is most definitely a public body and Article 10 makes no exceptions for different mediums of expression. In fact it specifically says that there is no limit to the type of medium that can be used to 'express' ideas. Unless you need a license to use it. Last time I checked, you didn't need a government license to surf the net or post a blog (maybe next year eh?).