The aim of this study was to assess the connection between students' perceived constructivist learning environment and their involvement in activities unrelated to class work via social media engagement (SME), while considering the moderating role of their openness to diversity and challenge (ODC) in explaining both variables. Another aim was to measure the impact of SME on students' achievement (GPA). Data were gathered from 271 undergraduate students. According to the structural equation modeling results, a negative coefficient result was shown between the perception of the learning environment as constructivist and SME constructs. ODC was found positively connected to both variables. The students' GPA was mainly explained by their cultural affiliation. Implications of these findings and directions for future research are discussed.