Hello Olivier, first off welcome to the AWS welding forum, it sounds as though you are possibly located outside of the United States presently? I ask that because besides selecting a welding school your son might like to have some input into the geographics of the area where he is being schooled. There are many really great schools all over the U.S., some are in warm climates, others not so warm, others might be close to water, yet others might be land-locked. Are there any relatives that he would like to be close to residing in the U.S.?, that might be a factor in your/his selection process. Is time or money an issue? There are lots of specialty schools that offer compressed and very area intensive welding options, they also generally have a pretty hefty pricetag attached to them. Still other schools offer a more general welding education and are longer in length regarding their curriculum. If you could give just a bit more detail about some of the items that I have mentioned you might get some better responses. You can also use the search function on the forum here and find a lot of other commentary on the very subject that you are asking about. Try typing in "suggestions for schools" or other such topics into the search box and see what comes up. Good luck on your search, look forward to a bit more information and forgive me if I have incorrectly come to the assumption that you are outside of the U.S. Best regards, Allan