[maryz]

It may be outdated, but I've read of it -- I think in some of L.M. Montgomery's books (Mrs. Lynde I'm pretty sure typically went to Sunday School), and in Life with Father (and probably others that escape me at the moment) -- all older books, you'll note. The practice IIRC was to hold Sunday School after church.

[GoLightly]

I never heard of it before, but it seems there is curriculum available, so I’d have to say it is being done!

http://www.sundayschoolcourses.com/