The IWF directly organises and manages the training centres in France (Lyon) and Spain (Barcelona and Salamanca).
It delegates this organisation for Italy (Udine and Grignasco), Slovenia (Ljubljana) and Columbia (Medellin).

Different modules are offered to enable anyone interested in the pedagogy of music and instrumental education to adopt the pedagogical principles proposed by Edgar Willems, according to their level of initial musical training and their framework of intervention.

The trainers working in all the training centres are holders of the Willems^® Professional Didactic Diploma or are in the process of obtaining it.