As one teacher puts it, "the education system is conning the country". In a special investigation, Simon Cox exposes how schools are using easy exams and flaws in the system to paint a false picture of their performance. He reveals how some schools that boast results that put them at the top of the league tables are being economical with the truth. What the tables are not making clear is that they are actually failing to get even a third of their pupils to pass the basic GCSEs. Cox also shows how parents can find out how their local schools are really performing. Producer Richard Vadon