Ho Soo Thong obtained his B.Sc. (Hons) in Mathematics from the University of Singapore in 1969. After graduation, he joined the education service and taught in post secondary level. Then, he wrote his first book College Mathematics Vol. 1 (with Tay Yong Chiang and Kho Kee Meng). He also embarked on his first research work for M.Sc., which was eventually published in the paper An Lp bound for the Remainder in a Combinatorial Central Limit Theorem (with Prof. Louis Chen) in the Annals of Probability 1978.

In 1980, he was awarded the Commonwealth Postgraduate Scholarship for M.Sc. in Computing Science from Imperial College, University of London. Upon returning from an enriching stay in London, he accepted an invitation to write the book Panpac Additional Mathematics (with Khor Nyak Hiong). The book and its revised editions has since been an approved textbook used in secondary schools in Singapore. He retired from teaching in 2003.

In 2010, he began to be interested in the bar modelling approach in PSLE (Primary School Leaving Examination, Singapore) and wrote the book Bar Model Method for PSLE and Beyond (with Ho Shuyuan). The book focus on counting approach to word problems with distinctive key features and the use of Euclidean Algorithm for greatest common unit procedure for Unitary Method.

The next book is “Problem Solving Methods for Primary Olympiad Mathematics” (with Ho Shuyuan and Leong Yu Kiang), the contents include ratio approach to word problems (bar modelling approach), geometric problems, word problems and speed problems.

He proposed a direct counting approach to challenging job problems in a simple book “Bar Model Method for Job Problems” in 2013.

For the bar Model Method at a higher level, he related the Euclidean Division Algorithm and the Euclidean Algorithm with the Greatest Common Unit Procedure for counting approach in his latest book Bar Model Approach to Linear Diophantine Equations.

In 2014, he founded the website barmodelhost.com to publish short live articles which are to be revised when necessary. These articles shows the exibility in the bar modelling approach to a variety of word problems involving different features with different problem solving strategies.

His latest focus is on examples and problems related to recent PSLE questions in a e-learning website alpha-pale.sg which  can provide e-learning for pupils preparing for PSLE Examinations. At the same time, he is keen to  promote the use of the bar model method for more challenging problems and compare the pedagogical value of the  approach with the traditional algebraic approach to word problems in the website alpha-beyond.sg.