The onset of the COVID-19 pandemic has caused disruptions to traditional face-to-face classroom teaching. In this communication, the practice adopted in the online teaching of three chemistry subjects in a local community college, student practice and feedback, as well as a case comparison of giving responses in online classes through a chatting platform will be discussed. Reflections from the current experience and literature findings as well as implications for the use of PowerPoint, classroom response systems, Teams, and Whiteboard toward an enhanced experience of online teaching will also be described.