I know the guy who does them in centerburg, a guy and a woman in newark.
Where are you looking for?
Class in Newark this weekend found
here its the same class my wife and I took.
Here is a link to the instructor at the Centerburg Conservation Club
here
Here is a link to the other Newark Instructor that I know. She's also on the NRA board of directors if that matters to you.
There are others in the Central Ohio area, but those three people I know and are the main ones I recommend.