1. Decision Analysis Description: Students will use a decision analysis chart to decide what cleaning product to clean the mildew in a shower. Students will rank the products using three criteria: (a) Effectiveness, (b) Safety, and (c) Personal Preference. Disciplines Covered: Social Studies & Health Prep Time: 30 minutes Activity time: 1 class period What Should I Use to Clean my Shower? Introduction

2. You have 20 minutes to complete this task 1.Work in groups of 2-3 2.Refer to product criteria and labels 3.Complete “Product Comparison” sheet for Tilex® and Lysol® 4.Rate Tilex® and Lysol® by the listed criteria. (*For each factor answer the question, “Does this product rate high (=3) or low (=1)”?) 5.Make a final decision about product choice. What Should I Use to Clean my Shower? Introduction Decision Analysis

3. X Student Worksheet 1: Household Product Comparison Product Criteria Tilex® Lysol® Antibacterial Kitchen Cleaner Vinegar Threshold (LOEL) LD 100 LD 50 Toxicity Signal Words Safety Instructions Product Appeal? Y/N Cost Non-damaging to Surfaces? Y/N Ease of Use Synthetic vs. Natural Product Other:

4. X Product Criteria Tilex® Lysol® Antibacterial Kitchen Cleaner Vinegar Threshold (LOEL)~0.001%~0.01%~1% LD 100 ~1%~100% Not able to determine LD 50 ~0.008%~0.5%~100% ToxicityModerately toxicSlightly ToxicNo Toxicity Label Signal WordsWarningCautionNo Signal Word Safety Instructions Gloves, ventilation recommended. Avoid breathing vapors No information listed Product Appeal? Y/NAnswers will vary Cost~$4.00 ~$1.50 Non-damaging to Surfaces? Y/N No Ease of UseSee directions No information listed Synthethic vs. Natural Product Synthetic Natural Other: Household Product Comparison Teacher Key

5. Student Worksheet 2: Decision Analysis Chart Cleaning Product Options Decision Criteria & Factors Tilex®Lysol®Vinegar Other Product: Effectiveness: Based on each of the three factors listed below which product do you think is the most effective? 1 = Least Effective, 2 = Moderately Effective, 3 = Most Effective Threshold (LOEL) LD 100 LD 50 Safety: Based on each of the three factors listed below which product do you think is the most safe? 1 = Least Safe, 2 = Moderately Safe, 3 = Most Safe Toxicity Signal Words Safety Instructions Individual Preference: Based on each of the five factors listed below which product is the most appealing? 1 = Least Appealing, 2 = Moderately Appealing, 3 = Most Appealing Product Appeal? Cost Non-damaging to Surfaces? Ease of Use Synthetic vs. Natural Total Product Score:

6. Student outcomes: Apply toxicology concepts to decision making; Decisions involve balancing costs, benefits, personal values and scientific evidence; Develop and use criteria for evaluating solutions to a particular problem; Use a decision chart to evaluate solutions or actions in light of specific criteria or goals; **In the HCP scenarios, students assess chemical risks to humans and environment. What Should I Use to Clean my Shower? Debrief Decision Analysis

7. Enrichment Ideas: Have students create their own criteria to rank products; Expand decision analysis to include more chemicals -- Conduct internet searches for other products that claim to control mold; -- Add these products into label reading and mold control activities Ask students to take on the role of various stakeholders (e.g. product manufacturer, parent, etc.) What Should I Use to Clean my Shower? Debrief