Nicole León first discovered a passion for teaching while pursuing her undergraduate studies at the Juilliard School. For more than two decades, she has mentored students of all ages in both the United States and France.

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Since settling in Paris in 2013, Nicole has remained active teaching in conservatories and private music schools throughout the greater Paris area.

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In 2021, she was appointed violin professor at the Sarcelles Conservatory of Music, where she taught violin as part of the initiative Un violon dans mon école. Launched by the Vareille Foundation in 2015, A violin can change the world is an educational program geared towards helping disadvantaged children improve their academic performance through rigorous violin instruction. 

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Nicole currently serves on the faculties of the Conservatoire à Rayonnement Départemental Erik-Satie du Blanc-Mesnil and l'Apprenti Musicien, where she also teaches chamber music. Fluent in English, Spanish, and French, she teaches in all three languages.