You label the 4 corners of the room as follows
- Dirt Road
- Paved Road
- Super Highway
- Yellow Brick Road
Explain the levels of proficiency that go along with the roads. Start with a fun idea like skiing, BBQing, Knitting. Have participants move to the corner that represents their level of expertise. Introduce themselves to someone new and explain why they put themselves in this group. Then move on to your PD related skills - Web 2.0, Digital Storytelling, Photography, etc.
This strategy can be used as an opener to assess the participants skill level with what you will be teaching.