In 2011, all students, nearly 250, left with one recognised qualification resulting in a 100% pupil pass rate. In 2012, as reported by Ofsted in the December 2012 report, Year 11 attainment experienced a 'significant dip'. In reporting on this situation, Ofsted stated that "During this inspection, all groups of students were making good progress in the large majority of lessons and outstanding progress in some lessons.". The report went on to state "..As a result, the progress made by all students, including boys, has now returned to the good levels seen in the past and attainment is rising rapidly across the school, particularly in English, mathematics and science." In 2012, the school's GCSE results fell, particularly prior to the English GCSE resits which were offered to all schools caught up in the national English GCSE examination scandal. This equated to roughly 1 in 14 students nationally resitting the examination in October 2012. Performance Tables for 2012 achievement published in January 2013, do not reflect the attainment of students who achieved a Grade C or above in these English GCSE resits (36% of Kingsdale pupils achieved 5A*-C GCSE grades with English and Mathematics). The school results published on their website are therefore considerably higher than this figure as they reflect the addition of resit grades (currently published at 5A*-C GCSE grades with English and Mathematics at 49%). The national average for secondary schools in England and Wales is 59% of pupils achieving 5 A*-C grades including English and Maths. In 2010 and 2011 the school was above national averages for the percentage of students achieving 5A*-C GCSE grades including English and mathematics. In 2012 it was below. The school has met the Government's floor target for school performance and this has been confirmed. The modernist building was designed by the London County Council Architect's Department, under the leadership of Leslie Martin. In 'austerity Britain', Martin's team had to scrimp on materials creating unique 'honeycombed' plaster walls and minimal scree between floors. Still the design observed the best principles of modernism, with concrete stairs positioned at each corner of the oblong building, boxed in glass and steel frames. The shoe-box shape described a 'quadrangle' that served as an inner playground as well as letting natural light into the corridors. William Turnbull's sculpture 'Stargazer', popularly known as 'the Fish' stood in the quad. In the early 2000s (decade), the architects De Rijke Marsh and Morgan and builders Galliford Try refurbished the building, adding a translucent, and sun-sensitive 'skin' over the quadrangle, adding additional corridors, and constructing a wooden framed, egg-shaped 'pod' that projected into the quad, containing a music hall.