The ability to add value to every child’s education and encourage them to perform above original expectations sets a 
school apart. The Yellis Baseline Test, produced by Durham University, is one way that added value can be statistically analysed.
As a school, Rydal Penrhos has chosen to adopt this method of testing when pupils are in Year 10, enabling the school to identify issues and take action to improve the performance of pupils.
The findings look at the GCSE results each pupil was predicted to get and compare these against their actual GCSE results at the age of 16. If pupils perform beyond expectations this is reflected in a high value added score.
Rydal Penrhos prides itself on consistently achieving results that put the school in the top 10% of Yellis tested schools, achieving residuals averaging over 0.5.
This means grades are at least 0.5 higher than might be expected for an average pupil, or that every other GCSE grade earned at Rydal Penrhos School is at least one grade higher than expectation.
Dedicated teachers and well-motivated pupils ensure that year after year, Rydal Penrhos is able to outperform far more selective schools at this level. 