“…Introductory science, technology, engineering, and math (STEM) courses often serve as undergraduate students’ introduction to STEM disciplines and associated majors. These courses offer opportunities to foster a sense of belonging in students and establish students’ science identities, especially for students from groups underrepresented in STEM (e.g., Schinske et al , 2016 ; Trujillo and Tanner, 2014 ; Sax et al , 2018 ). The first day of class may be an especially important time point, as it could be used to mitigate student concerns, establish course norms, communicate the importance of course activities, and increase student motivation through promoting positive student interactions and explanation of instructional choices ( DiClementi and Handelsman, 2005 ; Nilson, 2010 ; Chasteen, 2013 , 2020 ; Seidel and Tanner, 2013 ; Brazeal et al , 2016 ; Meaders et al , 2019 ).…”