 Two very influential 20th-century teachers of this approach were Henriette Renié and Marcel Grandjany, who studied with Alphonse Hasselmans.The other major French school is the Salzedo school, developed by Carlos Salzedo, who also studied with Alphonse Hasselmans at the Paris Conservatoire.Salzedo's technique generally calls for the arms to be held horizontally and emphasizes the role of aesthetic hand and arm gestures after the string has been plucked