Umm, that was the LAST step.
The first step is to set up the coarsest screen (indiustrial steel wire shelving with 1" gaps) at a shallow angle. I throw 3-4 shovelsfull of clay and rock on top.
Then I whale on it with the flat of the shovel and scrape it around a little with the edge of the shovel. This recovers all the clay, breaks it up, and separates out all the rocks over 1". This goes really fast, which is the goal.
I throw the rocks that don't pass through down a slope for future use in drainge ditches and walkways. The whole area downslope from my "screening stump" is the best-paved part of my yard!
Corey