I have been using Science Lab Cooperative Team Roles in my Science Classroom for years and this resource provides everything you need to create Cooperative Lab Groups in your classroom as well.
This resource outlines the Jobs for each team member. Full page Team Role Sheets are included to make a bulletin board display or to introduce in a slide show to your students. In addition, badge size Team Lab Role descriptions are also included so that you may allow students to have an individual description to refer to during the lab.
It also introduces exactly how to rotate the Science Lab Cooperative Team Roles each time you complete a new lab assignment.