Clark's encounter with Baron Sunday's magic triggers some latent abilities in him and he is visited by a Hogwarts representative to let him know that he is no longer a Muggle and to extend an invitation to study magic. (He might attend the school proper or, given his relatively advanced age, he might have an individual tutor, instead.) Lois and Clark decide that since he is vulnerable to magic, and since magic is apparently far more widespread than they had hitherto believed, it would be best for Clark to accept the offer.

What happens next?

Joy,
Lynn

http://www.lcfanfic.com/stories/2007/html/owlsover.html

and

http://www.lcfanfic.com/stories/2010/html/owlsovr2.html

some time in the future!