According to the Prince George Citizen’s editorial on Friday, September 9th:

Prince George’s district is one of only four in the province whose union staff is taking action by refusing to perform administrative duties – which could lead to missing report cards if left too long – as well as refusing to supervise students during recess.

http://www.princegeorgecitizen.com/article/20110909/PRINCEGEORGE0302/309099988/-1/princegeorge03/a-precarious-position

This is not fully accurate information. The teacher’s union is taking action across the province, not just in four districts. In six districts (at last notice) the school districts have cancelled recess, as a reaction to the job action, due to difficulty in replacing teacher supervision at recess time.

For more information about recess, please see:
http://blogs.vancouversun.com/2011/09/07/more-b-c-school-districts-cancel-recess/

There are additional resources about the teacher job action posted on this website.