A junior school forms part of the local pattern of provision for primary education.
[2] These four years form Key Stage 2 in the English education system.
At the end of this time, most pupils will move to a secondary school.
In the late 1960s and early 1970s, a significant number of junior schools were abolished in favour of 9-14 middle schools, and while some of these remain open today the majority of them have been abolished in favour of a return to traditional 7–11 junior schools.
In some London boroughs, a JMI is a "junior mixed infant school" which caters to children aged 4 to 11.