Listen to students’ responses to the question: why does ethanol burn like wood, even though it looks like water? Check to see whether some students are moving beyond labeling materials as “flammable” to thinking about chemical properties of flammable materials. Do any students mention chemical energy? Do any students mention C-C and C-H bonds? Note students' ability to identify organic materials based on observable properties; organic materials include foods, fuels, and bodies of plants and animals, and based on molecular formulas: organic molecules have C-C and/or C-H bonds.
Use 5.3 Grading the Organic vs. Inorganic Worksheet to grade student responses. At this point, students can be held accountable for correct answers. If students are still struggling with these concepts, you may want to revisit parts of the lesson they are finding difficult.