老士 (Lǎo shì)
Teacher
打开 (Dǎkāi)
Open/Turn on
听 (Tīng)
Listen
举手 (Jǔ shǒu)
Raise hand
耳朵 (Ěrduǒ)
Ear
规则 (Guīzé)
Rules
照相机 (Zhàoxiàngjī)
Camera
上课 (Shàngkè)
Class