Unit 5 – Worker Training and EducationBy Admin / December 29, 2014 You must first complete Unit 4 – Material Safety Data Sheets before viewing this LessonPlease sign up for the course before starting the lesson. In this unit participants will learn about employee and employer requirements for WHMIS. Unit 4 - Material Safety Data Sheets Unit 6 - Exception and Exemptions Back to: Workplace Hazardous Material Information System (WHMIS)