 In 1908, he moved to Moscow and until 1911 worked there at the icon shop of the Don Monastery.In 1911, he worked as an apprentice to Mikhail Nesterov on frescoes of The Intercession Church at the Convent of Martha and Mary ("Marfo-Mariinsky") on Bolshaya Ordynka Street in Moscow.Nesterov insisted that Korin gain a formal education in easel painting and arranged his admission to the Moscow School of Painting, Sculpture and Architecture in 1912.