At the beginning of every year, I call the roll asking every student apa kabar. This is both to prepare students for interactions with Indonesian visitors (intercultural understanding) and helps me learn student names (build relationships). With junior primary students, this continues for the year but with older students, other questions can be incorporated.
The posters offer suggestions that were initially proposed by upper primary students. They are an opportunity to check in with individual students at the beginning of each lesson to support their well being.