An Unearthed Arcana playtest document for the upcoming Strixhaven: Curriculum of Chaos hardcover has been released by WotC!
"Become a student of magic in this installment of Unearthed Arcana! This playtest document presents five subclasses for Dungeons & Dragons. Each of these subclasses allows you to play a mage associated with one of the five colleges of Strixhaven, a university of magic. These subclasses are special, with each one being available to more than one class."
dnd.wizards.com
It's 9 pages, and contains five subclasses, one for each the Strixhaven colleges:
"Become a student of magic in this installment of Unearthed Arcana! This playtest document presents five subclasses for Dungeons & Dragons. Each of these subclasses allows you to play a mage associated with one of the five colleges of Strixhaven, a university of magic. These subclasses are special, with each one being available to more than one class."

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It's 9 pages, and contains five subclasses, one for each the Strixhaven colleges:
- Lorehold College, dedicated to the pursuit of history by conversing with ancient spirits and understanding the whims of time itself
- Prismari College, dedicated to the visual and performing arts and bolstered with the power of the elements
- Quandrix College, dedicated to the study and manipulation of nature’s core mathematic principles
- Silverquill College, dedicated to the magic of words, whether encouraging speeches that uplift allies or piercing wit that derides foes
- Witherbloom College, dedicated to the alchemy of life and death and harnessing the devastating energies of both