<a href="https://www.theepochtimes.com/chinese-school-tracks-students-by-requiring-them-to-wear-chip-enhanced-uniforms_2748391.html" rel="nofollow">https://www.theepochtimes.com/chinese-school-tracks-students...</a> is another one on the topic. The uniform can activate an alarm when the sensor detects that a student has fallen asleep in class. Wish I had this when I was in school.