Being on secondment under the School-based Curriculum Development (Secondary) Section of Education Bureau this year, Mr. Ng King Fai from the Liberal Studies Panel of our school has held a lesson observation and professional exchange activity on the topic “Catering for learners’ diversity through questioning and feedback” on 7 Mar 2019. He demonstrated how to make students become active learners by different levels of questioning and feedback, as well as how to cater for learners’ diversity with differentiated instructions during the lesson. After the observation, an evaluation session was held for teacher participants to exchange ideas through professional dialogues.