Originally Posted by Unregistered

Even without SBB, students already differ in ability. In express classes, although everyone is an express student, there are those who are failing, those who are barely passing, those who perform averagely, and those who are constantly scoring distinctions and full marks.

The bar for G3 eligibility is quite low. Students might score enough to be offered the subject, but that doesn't mean they will do well compared to the mainstream group of students.