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Charles Ophardt, Eugene Losey

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1 Charles Ophardt, Eugene Losey
Student-Performed Demonstrations: Laboratory Component for Non-Science Majors - January Term Charles Ophardt, Eugene Losey Elmhurst College, IL 60126

2 Overview College students: Prepare demonstrations
Prepare and Present Demonstration Shows to elementary students

3 Goals Provide college students opportunities:
Learn science concepts and principles Non-traditional and innovative Creative and stimulating Hands-on Provide elementary students with motivational opportunities to learn science

4 Goals Provide elementary students with motivational opportunities to learn science

5 Objectives College students should be able to:
Explain science principles Develop science process techniques in developing demos Practice communication skills Gain insights in teaching science at elementary level

6 Courses Audience: Non-science majors
Mostly pre-elementary education majors

7 CHM 290 - Science Demonstrations
January Term - one month No General Education credit Initial six hours lecture on principles Prepare and test demonstrations Receive one-on-one individual help on explanations

8 Lab Format Demonstration Selection
Books of compilations from previous classes Published books and journal articles Developing Elmhurst College web site Outside Internet sites Organize into groups of 5-7 students Ensure cross section of demo selections Avoid duplication Select from among six favorites

9 Types of Demonstrations
Six Favorite Demos Performed in every show Hydrogen Balloon Liquid Nitrogen Polyurethane Foam Nylon Rope Solid Water Elephant Toothpaste

10 Hydrogen Balloon

11 Polyurethane Foam

12 Nylon Rope

13 Liquid Nitrogen

14 Solid Water

15 Elephant Toothpaste

16 Categories of Demonstrations
Demos that use household vs. “lab” chemicals Density Gases and pressure Twenty different uses of baking soda and vinegar Solubility and Polarity Simple reactions of elements Acid-Base Oxidation-Reduction Double Replacement/Precipitation Reactions Polymer reactions

17 Lab Format Demo Preparation Cycle
CHM 290 J-Term Two 3 hour days - prepare and test 4 demos First day - mainly preparation and testing Second day - receive help on explanations Prepare chemicals/glassware for shows Store and transport chemicals in a plastic bin

18 Demonstration Write-Up Format
Title Science Concepts Materials and Pre-preparations Directions to carry out demo Introduction and Commentary Explanation - college level Appropriate grade level explanation Safety Waste Disposal Reference

19 Preparation of a Poster
Drawings of Equipment and Observations Simple concept Names / Formulas / Equation

20 Practice Show Organized in a demonstration order Present practice show
Oral Presentation Rubric used for grading Instructor and peers provide suggestions

21 Future Direction Continue work with demo write-ups online with pictures Cross reference demos to “vchembook” Continue work on web site with concepts and explanations - “vchembook” Contains core concepts with pictures and diagrams Cross referenced to the demos

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