The Canadian Centre for Occupational Health and Safety has an online MSDS database
Health Canada has some good resources related to Workplace Hazardous Materials Information System (WHMIS)
Check out the Highschool Safety Page for operating standard lab safety equipment and performing other essential lab procedures
The NSTA Safety Portal provides a variety of lab safety and general lab resources for K-12 science
Vernier lab interfaces are a great way to add inquiry to your teaching. Follow this link to find more information on products and other teacher resources.