Investigating the optical properties of various chemical compounds using UV-vis spectrophotometers is an essential part of education in chemistry. However, commercial spectrophotometers are usually treated as "magic black boxes", where the dominant majority of optical elements are hidden "under the hood". This often limits…

Prior research has highlighted that for teachers to develop robust practices, they need to develop rich professional vision (PV)--the ability to see nuanced issues of teaching and learning in situ, interpret them, and respond. In the context of problem-based learning (PBL), PV involves guiding student-centered learning and understanding when to…