[servo_sausage]

Every study like this needs to adjust for common compounding factors; demographics, income, teaching methods, covid...

Otherwise it's junk data, we have have no idea if lower performance is due to more migrants, more computers, less sugar in cereal or whatever.

[moi2388]

Yes. And follow them as cohort. Do they start behind? Or gradually got worse? Or actually improved more than the previous generations?