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Well...I couldn't find WIZARD school, but I did find two in a more school based setting. RAN-Online is one, I believe it takes place in a schooly-style setting (at first at least)...but I've never played it so I can't say much there, its translations are horrible though.
Remnant Knights also takes place in a school setting, this one actually looks rather fun, I've yet to play, but it looks good...
Apologies, I noticed that your thread had no replies so I thought I would see what I could do...hope I helped even a little.
I wish you luck in your endeavors.