BBC News Online's rankings of state primary schools by their 2001 Key Stage 2 SATs - the national curriculum tests sat by all 11-year-old pupils.
This year for the first time there is an optional alternative ranking using the new "average point score" measure, intended to give a better indication of the performance of all pupils, not only those reaching the target level expected for their age.
There is information on more than 13,500 schools, grouped by the 150 local education authorities in England.
Every school has its own page, detailing key aspects of its performance and other information.
Read these first:
Analysis by BBC Education Correspondent Mike Baker.
Explanation of what is in the tables and of the abbreviations used.