In 1981 a multi-purpose building and gymnasium known as Building Number Six was built to commemorate the school's centennial. It was opened by King Bhumibol Adulyadej on 30 July 1984. Every year on 29th August – the founding day of the school – all O.S.K ("Old Suankularb") students assemble in front of Building Six where they pay respects to the large statue of King Rama V there. An auditorium was built in 1995 and opened that year by Princess Maha Chakri Sirindhorn. The teaching of science and technology has been a central policy of the school. The school possesses an extensive library, with some rare and valuable books donated by former Prime Minister Thanin Kraivixien.