This Keynote on video conferencing was a bit of a Cisco commercial but it included an interesting case study on Video conferencing activities and facilities at PLC.
This presentation showed various examples of the use of video conferencing including:
Virtual excursions
Collaborative projects
Professional development
Resources to look at:
Centre for interactive learning and collaboration CILC
CLX connected learning exchange
Interesting possibilities, particularly for Science, HSIE, PDHPE and TAS