Coil pottery is an ancient technique and a fun way to introduce functional ceramics to art students.
The process begins by rolling out a "snake" like shape with clay. This is used to coil, or spiral around in a circle to form the bottom of a bowl, or it can be added to a slab (clay rolled out into a shape) to form a small wall. Layers of coils are added using the slip-and-score technique in which the attaching edges are scored with hatch marks and a slimy clan-water mixture is added for glue. If the clay is very soft than the slip and score method isn't needed; as two pieces can be smoothed together.
In the past, I have had assignments in which the students must smooth the inside and outside as they go along building the wall, but for this assignment, only the inside was smoothed so that the outside showed the texture of the coil process. Students were encouraged to use a variety of ways to add coils, in squiggles, spirals, horizontal layers etc. This way the end product makes it possible to see, feel, and remember the process.