The National Curriculum 2014 covers the objectives in all subject areas which must be taught to all children in state schools.
English, Maths and Science have objectives defined for each year group whilst the other subjects are split into Key Stage 1 (KS1) and Key Stage 2 (KS2).
Key Stage 1 covers children in Years 1 and 2. Key Stage 2 is for children from years 3 - 6.
In some subjects KS2 is further divided into Lower KS2 which is years 3 and 4, and Upper KS2 which is years 5 and 6/
The link below is the government link, detailing all objectives. I have included another website with the same information which you may find easier to follow.