Student-Performed Demonstrations: Laboratory Component for ...

Student-Performed Demonstrations: Laboratory Component for Non-Science Majors - January Term Charles Ophardt, Eugene Losey Elmhurst College, IL 60126 email: [email protected] http://www.elmhurst.edu/~chm/demos/BCCE.html

Overview College students: Prepare demonstrations Prepare and Present Demonstration Shows to elementary students 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 Goals Provide elementary students with motivational opportunities to learn science

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

Courses Audience: Non-science majors Mostly preelementary education majors 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

Lab Format Demonstration Selection Books of compilations from previous classes Published books and journal articles Developing Elmhurst College web site http://www.elmhurst.edu/~chm/demos Outside Internet sites Organize into groups of 5-7 students Ensure cross section of demo selections Avoid duplication

Select from among six favorites Types of Demonstrations Six Favorite Demos

Performed in every show Hydrogen Balloon Liquid Nitrogen Polyurethane Foam Nylon Rope Solid Water Elephant Toothpaste

Hydrogen Balloon Polyurethane Foam Nylon Rope Liquid Nitrogen Solid Water

Elephant Toothpaste 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 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 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 Preparation of a Poster

Drawings of Equipment and Observations Simple concept Names / Formulas / Equation Practice Show Organized in a demonstration order

Present practice show Oral Presentation Rubric used for grading Instructor and peers provide suggestions 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 http://www.elmhurst.edu/~chm/vchembook Contains core concepts with pictures and diagrams Cross referenced to the demos

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