There is a burgeoning interest in enhancing teachers' professional development, as well as their wellbeing and personal resources. This study aimed to assess the effectiveness of a multicomponent intervention grounded in positive psychology to boost growth mindset, eudaimonic wellbeing, and multidimensional wellbeing and reinforce competencies associated with professional teacher training. The study enrolled 92 participants, separated into an experimental group receiving "FODI" intervention and a control group (62% experimental & 38% control), with a mean age of 44.7 (SD = 8.6) comprising 75 women and 17 men. The data was collected using a multiplechoice questionnaire assessing the study variables. The analysis of covariance indicates that the intervention significantly enhanced the scores of general and self-growth mindset, eudaimonic wellbeing, PERMA (including self-perceived health), and teacher training in participants compared to the control group. These improvements were statistically significant at p < .05. Interventions based on positive psychology may serve as practical tools for enhancing educational quality through teacher training, personal growth, and professional development.