Kallang West Government Chinese Middle School On 14 October 1956, during the
Chinese middle school riots, the
Ministry of Education established the predecessor of Dunman High School, Kallang West Government Chinese Middle School, along with other schools like
River Valley High School and
Hua Yi Secondary School. It was renamed Dunman High School after
Thomas Dunman. In the 1956 riots, Chinese middle-school students who subscribed to the communist ideology staged sit-ins and demonstrations, disrupted classes, and in effect shut their schools down. The function of the newly established Kallang West Government Chinese Middle School was to allow students who had no wish to be embroiled in communism to have a place to study. The premises of a newly built primary school at Mountbatten Road were loaned, and the initial enrolment included about 100 boys from
The Chinese High School, with 10 teachers. In December 1957, the school moved to Dunman Road and was renamed "Dunman Government Chinese Middle School".
Designation of Special Assistance Plan In 1979, the school was selected to be one of the nine
Special Assistance Plan (SAP) secondary schools. It was renamed "Dunman High School" and began to offer both English and Chinese languages at the first-language level. When the Music Elective Programme (MEP) was introduced by the MOE in 1982, DHS was selected to implement the programme for musically gifted students. In 1990, the school expanded by taking over the neighbouring former premises of
Dunman Secondary School at Dunman Road. It then became a single-session school (previously the school was divided into the "morning session" and "afternoon session" so that two classes of students could share a classroom). It was one of six schools to go autonomous in 1994. The school moved to its current location in Tanjong Rhu on 27 May 1995. It was made the 7th
Gifted Education Programme centre in Singapore in 1997.
50th Anniversary A
time capsule was launched on the opening ceremony of DHS's 50th anniversary celebrations on 31 March 2006. It is meant to be opened in 2031, on the school's 75th anniversary. Items such as the DHS uniform and the 2006 student handbook were placed in it. A letter by the current principal of the school was also included. In addition, a Heritage Run was organised that day. To meet the needs of the Integrated Programme, the school moved to a holding school in the former
Raffles Junior College campus at Mount Sinai in December 2006 to allow for upgrading of the current site at
Tanjong Rhu. The land area of the expanded campus increased from four hectares to seven hectares, making Dunman High School one of the biggest government-aided schools in Singapore. In December 2008 the classrooms, general office and staff rooms of the Tanjong Rhu campus were completed, and the school moved back to the Tanjong Rhu campus. On 2 January 2009 the school opened to a new year with an opening ceremony named "Homecoming" (回家) to welcome students and staff to the upgraded campus. On 5 September 2017, Dunman High was featured in an episode of Channel 8's "When The Bell Rings" documentary series. This eight episode documentary series featured eight Special Assistance Plan (SAP) Schools in Singapore, and told stories of their transformation through the times. The episode on Dunman High was the last episode to be aired.
Joint Admissions Exercise On 21 September 2018, the Ministry of Education announced that the final two remaining schools offering the IP - Dunman High School and
River Valley High School - would be participating in the Joint Admissions Exercise in future. The following year in 2019, Dunman High School took in its first batch of O-level JAE students. ==School identity and culture==