Here's a great scientific method lab is a great introduction for any high school biology class. You will find 100% engagement in a 4 step process that allows students to have fun collecting data and learn about plotting coordinates and identifying variables. The set-up is easy; it's a liver solution, test tubes, and pipettes (or graduated cylinders). The student sheet has directions, data chart, graph and questions. Objectives are to work collaboratively, follow instructions, measure temperature, collect and record data, plot data on a graph, identify independent and dependent variables, and analyze data. This is an easy set-up and an easy clean up. What a fun way to introduce independent and dependent variables. Note instructions are provided with sample data for teachers. A GoogleDoc link is provided.