Elementary Education Act 1870 further acts in 1876 ("the Sandon Act", which gave parents a legal obligation to ensure that their children were educated) and 1880 ("the Mundella Act") made attendance compulsory for children until they were 10 years old, with various exemptions. Many factory owners feared the removal of children as a source of cheap labour. However, with the simple mathematics and English they were acquiring, factory owners now had workers who could read and make measurements. Following continued campaigning by the National Education League, following the Elementary Education Act 1880, attendance to age 10 became compulsory everywhere in England and Wales. In
Raising of school leaving age in England and Wales including the introduction of the Tripartite System, included raising the school leaving age to 15. Although the act should have been brought into effect as from September 1939, it was not implemented because of the effects of World War II, but was eventually enforced from April 1947. The comprehensive school system has since replaced the Tripartite System brought in by this act across most of England. This act also recommended compulsory part-time education for all children until the age of 18, but was dropped, in similar fashion to the 1918 Act, to cut spending after World War II. Changes in