Primary education focuses on the development of knowledge, skills and understanding - academic, physical, aesthetic, emotional, social and spiritual. Every endeavour is made to adapt the curriculum to meet the needs of each student and in turn, each student is encouraged to develop to his/her full potential. A student learns best when the atmosphere is friendly and supportive, and at the same time, challenging.

John XXIII College Primary School has two classes at each Year level. In the Junior grades (Years 1 to 3), classes are 28 students per teacher while in the upper grades (Years 4 to 7), there are 30 students per teacher.