Paul Williams, Tom Okuma Using PhET Simulations in the Introductory Physics Classroom.

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Presentation transcript:

Paul Williams, Tom Okuma Using PhET Simulations in the Introductory Physics Classroom

Agenda 1. Introduction and Motivation 2. Free Exploration with Masses and Springs and discussion of incorporation into assessment 3. Brief Introduction to Tipers and demonstration of simulation based Tipers 4. Free exploration of PhET Website 5. Report on exploration of website

Motivation – Why Use PhET Simulations Desire to engage students in “minds on/hands on” activities Utilize computers effectively in the classroom Logistics Keep the costs down No programming Interesting Physics is dynamic not static – simulations show dynamics

PhET Simulations phet.colorado.edu

PhET simulations Free Web-based (Can be downloaded and run locally) Easy to Use Cover wide range of topics in introductory (and some more advanced) physics Research based Site is actively maintained and frequently updated Instructors can contribute and obtain activities

Uses of PhET Simulations Lecture Demonstration Ex – Electromagnetic Waves Interactive Lecture Demonstrations Ex – 1D human motion Directed Inquiry Activity Ex – Moving Man Simulation to explore relationship between velocity and acceleration Free Inquiry Activity Ex – Fourier Synthesis of Complex Waves adjust amplitudes and phases to match target function

Lab Activities Paired with Real Phenomena Ex – Examine wave reflection at a boundary with simulation and then compare to behavior of slinky Virtual Ex – Kirchhoff’s Laws circuit lab

Mass and Spring Activity

Task – 10 Minutes Explore the controls for the Mass and Spring Simulations See what kind of things you can observe or measure about the springs/masses See me if you want some suggestions Be prepared to report on your explorations

Tipers Tasks Inspired by Physics Education Research Alternative Format Questions Get students to think about problems from a conceptual viewpoint instead of formula viewpoint

Tiper Tasks Ranking Tasks Working Backwards Tasks (Jeopardy Questions) Troubleshooting Tasks Contending Students Tasks What if Anything is Wrong tasks Predict and Explain Tasks …

Task – A student builds a series circuit with a battery and three identical light bulbs. She correctly determines that the circuit will draw.3 A. Between each circuit element she inserts an ammeter. Before closing the switch she predicts what the reading of each ammeter will be as shown in the next slide. What if anything is wrong with her prediction?

.3 A.2 A.1 A 0.0 A

Assessments with Jeopardy Questions Use the Forces in 1D simulation to construct a simulation for the following FBD 1960 N 1000 N196 N 1960 N

Use moving man to complete the following graph 1.With a constant velocity 2.With a constant acceleration 3.With a continuous velocity

Fission Reactor Task Open the Nuclear Fission PhET 1. Explore the controls 2. What do the control rods actually do? 3. Find a way to sustain a controlled chain reaction with minimum removal of the control rods

Contact Information Paul Williams – Austin Community College Tom O’kuma – Lee College

Sample Directed Inquiry Activity Click on Clear and then Yes in the confirm box. Enter -1.0 in the acceleration box and -2.0 in the velocity box, and then click Run. Click on Stop once the man runs into the wall. Q27) Describe what the man does when you click run. Q28) Sketch the graphs of position vs. time, velocity vs. time, and acceleration vs. time in the space below. Q29) In this case, when the man accelerated at -1.0 m/s/s how did the velocity graph change over time?

Comparison of ILD and Free Inquiry – Moving Man Activity 2 concept test questions Administered by Clickers

Q1. A car has a + velocity and a – acceleration. Which of the following are true. A. The car speeds up B. The car slows down C. The velocity is constant D. The velocity is 0 E. Some other answer

Q2. A car moves to the left and speeds up. What direction is the acceleration of the car? A. Right B. Left C. The car isn’t accelerating D. Some other answer

ILDDirected Inquiry Q167% Correct73% Correct Q267% Correct Comparison of ILD and Directed Inquiry

Free Inquiry Students adjust the amplitude and phase of different Fourier components To match the pink function

Lab Activity View simulation prior to paired activity on slinky Prior to inclusion of simulation 16% of lab groups answered question about phase at open boundary reflection After 83%

Clicker Tipers (Tasks Inspired by Physics Education Research) Alternative Format Questions Get students to think about problems from a conceptual viewpoint instead of formula viewpoint Examples of Tipers – Ranking tasks, jeopardy questions, contending students tasks, what if anything is wrong task, … Administered with clickers Tied to a simulation

What if anything is wrong with the predicted values of the ammeter readings? 1. Nothing the predictions are correct 2. The values are correct but the order of the readings should be reversed (13%) 3. The readings should all be the same (87%) 4. The readings should be greater on the outer ammeters 5. The readings should be greater in the middle 6. Some other answer