According to Mrs Phyllis Tan, in a casual conversation on 27 May 2014 between herself and Suzy Tan, Toa Payoh Integrated Primary School started sometime in 1954 or 1955. It became Thomson Primary School 1 Sep 1970 based on records she has with her.
The principals through the years, from the 1950’s onwards until just before its merger with Lee Kuo Chuan Primary School and Rangoon Primary School were as follows:
Front row from left to right:
Mrs Masduki, Mrs Chow Chin Choo, Mrs Mary Sng, Mr Leng, Mrs Tay Seow Huah, Mr Cheah (Principal), Mrs Phyllis Tan, Mrs Eng (Chinese tr), Mrs Nonee Teo, Mrs Nancy Yong and Mrs Florence DeSouza.
2nd row: Mrs Toi, Cikgu Sulaiman, Mrs Loy, Ms Eileen Seah, Miss Lee Woon Ling, Mrs Tan, Mrs Char, Mdm Wong ( Chinese tr), Mrs Ong Siew Luan, Cikgu Saadiah, Ms Chan Shong Yong, Mdm Soo and Mdm Lim .
3rd row: Mr Rama, trainee tr, trainee tr, Mr Wong Kwong Siong, Mr Lee Tuck Choong, Mr Yeong, Mr Lau Soo Har and Mr Chan Tian Seng.