The Salem Witches' Institute - 

Transfiguration is a subject taught at The Salem Witches’ Institute. It teaches the art of changing of the form and appearance of an object. This type of magic is commonly referred to as "Transfiguration." There are limits to transfiguration, which are governed by Gamp's Law of Elemental Transfiguration. Like Charms work, Transfiguration is achieved through concentration, precise wand movements, and the proper pronunciation of an incantation. However, it is generally more difficult than Charms and it requires great effort. Students practice actual transfigurations during Transfiguration classes. Accidents sometimes result in partial transfigurations.There are also many branches of Transfiguration, including Cross-Species Transfiguration and Human Transfiguration.

Transfiguration is a required subject for all first year students, with the option of N.E.W.T. classes in the sixth and seventh years for students who qualify.