Maybe the most damaging "ignored-story" of our lifetime!-----An EdTech Tragedy - by Jon Haidt and Zach Rausch

A groundbreaking UNESCO book on the damage wrought by ed-tech during COVID school closures around the globe - Jon Haidt and Zach Rausch
In The Anxious Generation, we focused on the emergence of the adolescent mental health crisis that began in the early 2010s.
However, since the book’s publication one year ago, we have learned even more about worrisome trends in education that closely mirror those in mental health: after decades of stability or gradual improvement, test scores in the U.S. and around the world began declining notably in the 2010s...
Here’s a figure from that essay (re-graphed by us), showing that the decline is happening across the dozens of countries that participate in PISA (Program for International Student Assessment). 

As with the mental health declines, these decline started after 2012, not 2020.

Figure 2. 15 year olds’ performance on PISA exams between 2000 and 2022. Source.