"Sweden, which famously did not close its schools (for the PISA ages tested), scored its worst in 2025, and, in fact, lost an entirety of THIRTY POINTS on the PISA metric (15 MONTHS OF LEARNING LOSS) during the 2018-2025 natural experiment in which they kept their schools

Tyler Black, MD

@tylerblack32 · Twitter · 2026-09-11 16:28 UTC

Sometimes you have to just let the data speak https://x.com/i/article/2098437997276577792