The M3C-Necker is organising on a regular basis a Teaching course and Master Class named “M3C Academy” aiming to develop knowledge and skills in different congenital and paediatric cardiology topics. This course/master class will take place at the Hôpital Necker Enfants malades twice per year. The agenda of this one day teaching course might include : 1-Master class open to trainees and confirmed paediatric cardiologists, cardiac surgeons and potentially other specialists involved in the care of paediatric cardiac patients or adult congenital patients. 2-Update teaching course on the proposed topic with interactive discussions and analysis of “real-life” cases. 3-Auto-evaluation and post-course evaluation.