“…For example, teacher self-reported teaching quality and enthusiasm may be biased by teaching ideals or self-serving strategies (Wubbels et al, 1992), while classroom observations tend to be expensive and time-consuming and provide only a snapshot of classroom events (Scherzinger & Wettstein, 2019). Likewise, the validity of student-ratings can be compromised by students' insufficient knowledge of methodology and didactics (Wagner, 2008) and/or colored by teacher popularity and grades they obtain (Aleamoni, 1999;Muijs & Bokhove, 2017). Despite these drawbacks, students are considered to be an excellent source of information on classroom processes (Montuoro & Lewis, 2015) since they are the direct and regular observers of teaching, they can compare different teachers, and they tend to have strong opinions on who the 'good' and 'bad' teachers are (Muijs & Reynolds, 2018).…”