Investigation: How Does Concentration Affect the Reaction Rates of Enzymes Objectives: to observe the catalytic action of yeast catalase on hydrogen peroxide to determine the effect of substrate and enzyme concentration catalase activity Inquiry-based laboratory investigations can encourage educators to move away from the traditional teacher-directed model and start to use more student-directed experimentations in their classrooms. In this workshop we will talk about how inquiry-based instruction can encourage students to make connections between biology concepts and increase their knowledge and skills. In the workshop you will - as students - work through an inquiry-based investigation to answer the question: How Does Concentration Affect the Reaction Rates of Enzymes?” Within this investigation you will learn how you can assess your students’ thinking processes and understanding of biological concepts by testing a hypothesis, analyzing data, and communicating results. Our goal will be to enable you to get your students to learn by discovering knowledge for themselves as they observe and explore in the laboratory. A creative approach to teaching enzymes with a lab that aligns with the 9th grade MEB learning objectives and enables students to use scientific reasoning and critical thinking; while collecting data and applying quantitative skills in an inquiry-based investigation.