A school in China is monitoring students with facial recognition technology that scans the classroom every 30 seconds

The technology scans classrooms at Hangzhou No. 11 High School every 30 seconds and records students’ facial expressions, categorizing them into happy, angry, fearful, confused, or upset. The system also records student actions such as writing, reading, raising a hand, and sleeping at a desk.

http://www.businessinsider.com/china-school-facial-recognition-technology-2018-5