What are some working proxy sites?
School’s are legally bound by the federal Children’s Internet Protection Act to block proxies and the like. Schools have to take this seriously to get certain technology funding. All the proxies you try should be blocked by your school. That is because most schools use content blocking software. It blocks proxies 98% of the time because of their content (that they are a proxy), not because of the web address. You are very very unlikely to find one that works and even then it will only work for a short time until they know you are using it. Your risking your computer rights/detention/suspension by trying to bypass their security. It’s not worth it, do your school work. But if you cannot get over your addiction to social networks etc, then get a phone with internet access instead.