Contributed by LUIS TIRTASANJAYA LIOE, LIM AI WAH Present Situation: In 2018, we started to build the culture of Open Classrooms, i.e. to have a teacher to send an open invitation to other teachers in school to observe his/her lesson. The intent is to promote sharing and discussion among teachers anchored in the students' learning and pedagogical practices. In 2018, we have started by getting the Key Personnels (HODs, SHs) and Senior Teachers to open up their classrooms. Throughout the year, there have been a number of Open Classroom invitation sent out to all staff. There are feedback from some teachers that the information that was mentioned in the invitation sometimes are too generic (e.g. by just mentioning the date, time and topic). We acknowledge that teachers' may have various need and naturally they would prefer to observe lesson that help in their own development. For example, if I need idea on how to use SLS to facilitate classroom discussion, I would want to visit