[drivebyops]

You think this is weird. Then realize kids get put on their school group based on the birth year in the west anyway.

I wonder how a biological age based school grouping system would work out.

[beojan]

Biological age on which date?

[karmakaze]

Date of conception.

[beojan]

I meant what date do you compare ages on, but since you need to put students in classes (you can't exactly have a class for each date of birth).