Looking for a class in 3D Printing/Modeling for a teenager

Hi,

I am looking for a 3D modeling class for my 16-year-old son and wonder if anyone has any suggestions.  My son has a 3D printer and really wants to learn how to use it better.  He's made numerous attempts at making a print, but they all end up not being successful.  He's frustrated and I can see his interest, once very high, is waning.  He needs a hands-on class or workshop -- not another YouTube video.  Has anyone had any experience with learning how to make stuff with a 3D printer from a class/school?  I appreciate any recommendations or suggestions. Thanks very much!