The class-size problemWhy large classes cost less but may deliver less
A large tuition centre can charge less per student because the same teacher is serving many students at once. The cost savings are real. The structural constraint is also real: with 30 students in a room, the teacher cannot check each student's working, cannot see where each student's method breaks, and cannot correct individual errors in real time. Students who attend passively but whose working is never checked will often repeat the same mistakes month after month. The fee is low; the cost of the uncorrected error compounds over time.
The value comparisonSmall-group class vs large centre: how to compare fairly
A small-group online class at RM250 per month gives 6 hours of class time spread across 4 sessions. If those sessions include active working-checking and method correction, that is 6 productive hours. A large centre at RM100 per month that provides 8 hours of class time, but where the student is passive throughout and no one checks working, may produce less learning per ringgit. The comparison to make is not the headline price but the format of participation and the teacher-to-student ratio.