The present study sought to investigate the effects of a multidimensional educational intervention on high school students' motivation and engagement. The intervention incorporated: (a) multidimensional targets of motivation and engagement, (b) empirically derived intervention methodology, (c) research-based risk and protective factors, (d) established practices that nurture optimal youth development, (e) use of interpersonally skilled staff, and (f) evidence-based programming. Using a pre-/post-treatment/control group design, it was found that the self-complete intervention brought about significant shifts in motivation and engagement. Specifically, findings showed that the treatment group made positive motivation shifts on key dimensions including task management, persistence, anxiety, failure avoidance, and uncertain control. Moreover, against a large weighted external comparison group, the treatment group made positive shifts on valuing, mastery orientation, planning, task management, persistence, failure avoidance, uncertain control, and self-handicapping. Taken together, these findings attest to the potential for multidimensional educational interventions for enhancing students' motivation and engagement.