@Butrflynet,
That's true re my experience too, and I'm an older sort, where a great many kids were in classes taught by one nun. She (many shes over the years) would tend to the handwaver, or two, of choice, or not, those among of wavers, and then cold call (a phrase I didn't know then). How else to get a variety of students engaged?
The trouble to me now re my classes back then (late 40's, 50's in elementary and high school) were that the games I loved by Sister Mel (all baseball, all the time, two teams, many things to spell or add or divide or identify) was that it left quite a few kids feeling dumb, which now we know a bit more about.
I just wanted to beat Ronnie Miller once.