This feature looks very promising . I would love for my spellcasters to give magical classes with spellcasting and potion brewing. Those aren't skills so I might have to substitute them with writing classes (studying spells) and mixology or herbalism classes. With the right surroundings it might do the trick.
AgnesValravnwe have something similar in Belgium (volwassen onderwijs = adult education) where people can learn a wide variety of skills, mostly in the evening. This could be a language, a skill (sewing , photography , . . .) this would be a great idea. That way my supersim can make money with her many maxed skills.