National Union Of Teachers Strike Closes Thousands Of Schools [Getty Images]

LIVERPOOL, UNITED KINGDOM - MARCH 26: Members of the National Union of Teachers (NUT) take part in a rally during a one-day walkout by teachers across England and Wales on March 26, 2014 in Liverpool, United Kingdom. Members are protesting against changes to their pay, pensions and working conditions, disrupting the lessons of thousands of children across the UK. (Photo by Christopher Furlong/Getty Images)

Getty Images News Christopher Furlong