This question is asked regularly, but I am afraid that the nearest you will get to an answer here is that we agree with school policies on blocking such sites.They are there for a reason.
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You can use a proxy. There are a few free ones avaliable such as:anonymouse http://www.phproxy.co.za/ http://botproxy.com/http://www.phproxysite.com/One of the first things these content filters do is to block anything it thinks is a proxy so you may find that these are blocked.I would suggest that you could install your own proxy server at home, but the fact that you can't seem to construct a sentence properly implies that it may be a little out of your comfort zone.Organisations have a right to filter their network however they see fit, and bypassing it to get to entertainment sites is unwise. Sometimes there are understandable reasons why you would want to bypass them. My proxy is used by my wife if she needs to check an email or add an item to our tesco order. At school, you may get told off but in the work place you could potentially lose your job.
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We can't get past them either - you need to become a school's network manager.
Learn to live with it (I had to). :(
Why don't you just use a smart phone? ...if you have one.
You can't: live with it. School is for, well, school stuff.