The school offers the four-year Express course leading to the Singapore-Cambridge GCE Ordinary Level national examination.

[8] From a cohort of fewer than 100 Chinese girls, the student population grew rapidly and in 1921, the school moved to a new building in Bencoolen Street to accommodate its expansion.

[9] By 1928, the Basic Teacher Training Programme had started and the student population continued to grow, leading to space constraints.

The old building at Bencoolen Street continued to function as a branch school offering primary classes.

In 1941, Nan Hwa Girls' School was forced to cease operations as a Japanese invasion drew near.

The school complex at Adis Road was turned into the headquarters for the Imperial Japanese Army shortly after the surrender of the British colonial forces.

Due to the overwhelming financial support of many parents, secondary classes were set up and the school's enrolment rose to 700 pupils.

[3] On 12 December 1982, Nan Hwa Girls' High School moved from Adis Road to Clementi Avenue 1 on the recommendation of the Ministry of Education (MOE).

The three corners of the triangle, a distinct feature for many Chinese schools, represents the moral, intellectual and physical developments of students.

The verse in English are written by Miss Ho Lai Lin, and the song was moderated by Chin Wai Fah.

[18] Nan Hua High School's current campus lies on 292,710 square feet (27,194 m2) of hill land at 41 Clementi Avenue 1.

The sky garden was the culmination of a variety of proposals put forth by students after a challenge issued to them by then Principal Dr Foo Suan Fong to come up with ideas to transform the space into one which could be used not only for casual meetings, but also for lessons and CCAs.

[20] The auditorium, named after the school's top donor, the Yeung Ching Foundation, is also located on the same level as the sky garden.

Nan Hua High School offers the four-year Express course which leads up to the Singapore-Cambridge GCE Ordinary Level national examination.