A new Summer Course 2010 for teachers is just announced:
http://www.hsa.ie/eng/Education/Safety_and_Health_Training_for_Teachers/Online_Summer_Course/
Other short Health and Safety Courses for students and Science Teachers are availble here. Click on the links below or http://alison.com/hsa/
Get Safe - Work Safe: Workplace Safety and Health for Senior Cycle Students
An Introduction to Managing Safety and Health in Schools
Safety and Health in the Science Laboratory for Teachers