SATs (Standard Assessment Tests) are given at the end of year 2, year 6 and year 9 (secondary school). The tests cover three core subjects; reading, writing and maths.
The current primary school Performance Tables published by the government can be found here:
Performance Tables Website
SATs Results 2015
Year 6: Achievement at the end of Key Stage 2
Level 4 = National Expectation
Level 5 = Above National Expectation
Reading, Writing and Maths combined
83% Level 4
30% Level 5
Reading
93% Level 4
57% Level 5
Writing
87% Level 4
33% Level 5
Maths
95% Level 4
52% Level 5
Progress from end of KS1 (Year 2) to end of KS2 (Year 6)
100% making at least expected progress in Reading
96% making at least expected progress in Writing
98% making at least expected progress in Mathematics