Desouches was headmaster. The final project was completed in 1971, although the school has undergone major renovation and expansion. A domed room, called 'The Dome", used as an alternate concert venue to the gymnasium and as the biggest examination hall, was built as a third floor on top of the science laboratories in 1997. In 2001, a further six-room expansion was made at the back of the Senior Block. In 2010, a plot of land was purchased at the end of the school to increase green spaces. The land underwent turfing and several picnic tables were placed on the new lawn. In addition, a huge structure designed by architect Prof Javier Senosiain, named Moctezuma's Lion was placed to the right of the lawn and was designed to integrate a piece of art with a playground. Grade equivalence Primary school Kinder 1–3, as well as Junior 1, form the infant school. The Kinders finish school at 13:30, while the rest of the school ends at 14:45. They study subjects such as mathematics and English. The primary school consists of the years Junior 2–5, and no longer follows the PYP. The International Primary Curriculum (IPC) has now been implemented at the school. In recent years, a number of "firsts" have been achieved. For example, the first overnight trip, the first play, first "museum" show, among other major projects. In addition, the outgoing primary schoolers enjoy an "Experience Day", where they get a taste of the life in secondary school. Secondary school Forms I-III take part of the secondary School and offer traditional disciplines like mathematics, the sciences, music, art, French, and English. Form IV, form V, lower VI, and upper VI are the continuation and are a part of the secondary school, equivalent to a four-year high school in the American system. The third formers choose their IGCSE subjects towards the end of the year, and concentrate on their options over the next two years, before becoming IGCSE candidates at the end of Form V (except for advanced mathematians, who take the extended IGCSE Mathematics examinations at the end of Form IV, before taking the additional mathematics papers at the end of Form V). Students are expected to sit eight to ten IGCSEs, and must pass five in order to pursue the IB at the school. The Lower/Upper VIs study the IB. They choose six subjects according to the IB programme, and