The Welsh government school banding table revealed

All secondary schools in Wales have been placed in a banding group of between one and five.

It's an assessment of a school's performance in the academic year 2010-11, with Band 1 being the best and Band 5 the worst.

The banding works by assessing school performance within four broad categories to produce an overall score:

• The percentage of pupils achieving five A* to Cs at GCSE including English or Welsh and mathematics

• The best eight GCSEs of pupils

• The performance of pupils at GCSE in English or Welsh and mathematics

• Attendance

Within each category, a school's score is modified to take into account the percentage of pupils eligible for free school meals.

Most of the categories also take into account a school's progress over time, to reward schools that are making improvements in performance.

Within the four broad categories, schools are scored on 12 separate measures in total.