Why are Generation Z test scores declining?

Why are Generation Z test scores declining?

Is it possible that the intelligence of an entire generation will decline?

Reading, math and science scores are falling on the world's largest international test of 15-year-olds.

This decline began around 2012, and appears to be increasing, particularly in reading.

There is something worrying about Generation Z. The world's largest international study of 15-year-olds has revealed a worrying decline in science, math and reading scores.