原文开头
Last school year, every kindergartner entering the Los Angeles Unified School District was almost cer- tain to spend some school time staring at a screen. This year, not so much. The school board for the nation’s second largest district has banned educa- tional technologies, or EdTech, for kindergartners and first graders and is imposing strict use limits for others: a daily maximum of one hour for grades two to five and two hours for grades six to 12. …
摘自《科学新闻》(Science News)第208卷 第9期 · 2026年9月刊。仅引用开头一小段供了解文章,版权归原刊所有,全文请阅读原刊。