Evaluation of Mathematical Literacy as part of the three aspects of Programme for International Student Assessment (PISA) ,which is the application of mathematical knowledge to real situations in a variety of contexts.
To solve such a problem, the Mathematising Process is required in order to achieve a reasonable answer.
However, the PISA test scores of Thailand students lower than the average of 65 countries.
This may be due to lack of Mathematising Process of student.
In this paper, related content is discussed the Mathematising Process in PISA test and proposed are Teaching strategies used to develop or improve Mathematising Process of students.