A secondary school student has apologised to his teacher after being filmed shouting at him in class.

Spectra Secondary principal Krishnan Aravinthan said on Wednesday that the student "has reflected on his actions and is very remorseful", adding: "He has apologised to the teacher concerned."

Mr Aravinthan added that the school "takes a serious view with regard to student discipline and has high expectations of our students' behaviour". He has counselled the student involved.

The school is also using the incident - which was uploaded to YouTube on Tuesday - "as a teachable moment for students".

The clip showed the student walking around the classroom talking to his classmates. When the teacher asked the boy to return to his seat, the student then shouted at his teacher and demanded an apology.

Spectra Secondary is Singapore's second specialised school for students eligible for the Normal (Technical) stream. It took in its first batch of students this month, with each getting a tablet computer to assist their learning.

The only other specialised school is Crest Secondary. At both these schools, students get to learn vocational skills such as mechanical servicing and retail services on top of English, their mother-tongue language and mathematics.