Based on the conceptualisation of the 21st Century Competencies Framework from the Center for Curriculum Redesign (CCR) we developed an online program to enable school-age students to increase their level on several social-emotional competencies. BE organized is a program that aims to help students to better organize themselves to be more efficient in today’s and tomorrow’s world. To do so, 12 individual sessions were designed to develop 4 out of the twelve 21st century competencies:Critical Thinking,Mindfulness,ResilienceandMetacognition; collective sessions (action lab) to develop others such asCreativity. We used a mixed methodology, i.e., quantitative (two questionnaires) and qualitative (reflective questions) evaluation to test whether the targeted competencies have been developed during this program. Preliminary results (since it involves only a small number of participants,n =27) partially confirm our hypotheses. Both qualitative and quantitative data show a development of critical thinking; the cross-sectional results are more mixed for the other three targeted competencies. Moreover, some other competencies, such asCreativityandGrowth Mindset,seem to be developed during this program. However, it is difficult to determine whether it is the group and/or individual sessions that are responsible for these non-targeted competencies development. These results will be discussed in relation to the youth literature on 21st century competency and the broader literature on socio-emotional learning (SEL) and/or emotional intelligence (EI).