The Office for Standards in Education, Children's Services and Skills is the non-ministerial government department, that regulates and inspects a range of bodies involved in education and other services for children. They carry out frequent inspections of schools and other institutions and then produce reports, which they publish on their website.
Their school inspections include looking into how students are taught to act safe online and behave responsibly; namely, their 2010 publication "The safe use of new technologies".
According to the report, the schools that blocked less websites and therefore taught their students to act responsibly when online, received a score of outstanding. They refer to these programmes as 'managed systems', where good practice and safe internet use are taught in the curriculum.