Children begin their secondary education at about eleven years age. There are different types of secondary schools in England and Wales. The most popular are comprehensive schools. These are large state schools for boys and girls of all abilities aged 11-16 (or 18). Comprehensive schools were introduced in the 1960s with the aim to replace the system of dividing children between more academic (grammar) schools and less academic (modern) schools. There are some Grammar schools that still exist now. They teach more academic subjects than comprehensive schools.