This is the statutory national curriculum framework. It is issued by law; you must follow it unless there’s a good reason not to. The framework includes the programmes of study for all subjects for key stages 1 to 4.
The national curriculum sets out the programmes of study and attainment targets for all subjects at all 4 key stages.
All local-authority-maintained schools in England must teach these programmes of study.
The majority of this national curriculum was introduced in September 2014, with English and maths coming into force for all year groups from September 2016.
The exception is the science curriculum which came into force for year 10 pupils in September 2016, and applies to year 11 pupils from September 2017.