美国的一所高中禁止学生在校使用手机
When students got their textbooks in early 2019 at San Mateo High School in California, USA, they also received the Yondr pouch, a locking device for their phones.The phone slides into it and gets locked through a magnetic device. It”s not unlocked again until the final bell rings. The procedure repeated every day for the rest of the school year.
2020-07-07(万方平台首次上网日期,不代表论文的发表时间)
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