Zhè wèi jiàoshòu jiǎngkè de shíhou, qìfēn zǒngshì shífēn huóyuè.
When this professor lectures, the atmosphere is always very lively.
Tips
usage
讲课 (to give a lecture, teacher-focused) vs 上课 (shàng kè, to have class, can be teacher or student) vs 教课 (jiāo kè, to teach a class). Students 上课, teachers 讲课 or 教课.