If this is a beginners class then you would have to at
least take time introducing them to ceramic
techniques, clay types, tools, and glaze or painting
techniques. Once those have been practiced and
experienced you could move on to projects.
You could base projects on realistic, biomorphic,
structural forms. Borrow from the past; pilars,
statues, bust, fountains, buildings etc. Looking at
works from cultures: Japan, South American, Native
American, African etc.