Purpose: While sustainability experts point to interrelated social, economic and environmental goals, students may think about sustainability primarily as natural resources. To prepare students to tackle global challenges to well-being, this paper aims to show that educators need to assess and address students' shortcomings in considering socioeconomic dimensions. Design/methodology/approach: This study coded essays on the meaning and components of sustainability written by 93 undergraduate and graduate students in environmental policy, business and engineering courses at US and Austrian universities. Then, the study reviewed a teaching strategy using diverse experts, case studies and assignments. Finally, the analysis evaluated students' final projects proposing sustainability legislation with social, economic and environmental dimensions. Findings: Students usually connect sustainability with limited natural resources affecting current and future generations, but seldom think that sustainability means acting on prominent socioeconomic challenges like poverty, food insecurity, pandemics and violence. Teaching in diverse courses through multidimensional case studies and legislation broadened and deepened students' understanding and preparedness to act. Originality/value: Despite experts' attention to the interconnected Sustainable Development Goals, educators and policymakers need information on whether students associate sustainability with socioeconomic challenges. Open-response questions can reveal gaps in the respondents' sustainability beliefs. In a wide range of courses, teaching can use diverse experts and multidimensional case studies and legislative assignments.