the instructor has leather-hard bowl shapes ready to demonstrate the trimming process as well.
Students are required to make a set of 4 practical bowl shapes, and trim a foot on the bottom.
Evaluation:
3 points -- Consistent thickness
2 points -- Practical/usable shape
2 points -- Trimmed foot
3 points -- Quality and workmanship
10 points
A pictorial showing the process of making bowls can be found Here.