Students and parents are mourning the loss of a much-loved teacher who collapsed and died in front of students yesterday at a Melbourne school.

Physics and mathematics teacher Satya Nadan, who taught at Berwick College for more than 17 years, died yesterday while at work.

It's believed the 60-year-old suffered a seizure and heart attack in front of horrified students.

His death is not being treated as suspicious.

Mr Nadan is today being remembered as a "much-loved friend" who was a "wonderful and thoughtful teacher".

"Rest In Peace Mr Nadan," one student wrote.

"Couldn't have asked for a better homegroup teacher, will miss seeing you every morning."

Berwick College principal Kerri Bolch sent her condolences to the deceased's family. Picture: Supplied (Facebook)

Another student said he was "one of the greatest teachers I'll ever have".

"Such a wonderful, happy man and such a support to many people. You will always be missed."

Mr Nadan migrated to Australia from Fiji in 1990 with his high-school sweetheart.

In a statement to families, Berwick College principal Kerri Bolch sent her condolences to the deceased's family.

"We are grateful to our school community for the way they care and support each other," the statement read.