If you would like to challenge your students and engage them more actively in the scientific process, you can use the second laboratory day for a student-designed investigation. Each group of students will develop their own plan to identify the thief by testing Jerell's evidence and the types of food that were eaten by the coworkers for the different types of organic compounds. For this investigation activity, you can use the last page of these Teacher Preparation Notes to replace pages 5-6 of the Student Handout. You may want to have a class discussion of the strengths and weaknesses of.
