4.5. Implications
The lack of significant effects on the study outcomes in this study does not imply that systematic work with the psychosocial learning environment is futile. Rather, more developments are needed to tailor efforts to specific psychosocial and academic outcomes, as well as to be attentive to sociodemographic characteristics, such as age and gender. As indicated by the effect studies in the COMPLETE project, a small effect on mental health was identified for girls after the first year [Further, taking a whole-school approach, like the COMPLETE project undertook, is a demanding endeavor, but building systematic systems and cultures for a positive psychosocial learning environment that are integral parts of the school will likely be more effective than interventions that only last for a short period of time. Implementation research has shown that new efforts introduced into an organization may need three to five years to be fully integrated and successfully implemented [