Pendulums

Table of Content

Design Team

Katherine Kretke (DTL) , Sora Kim, Marc Bresler, Barry Kluger-Bell (design facilitator)

Aug 14 -
Aug 19 - Materials List, plan for Practice
Aug 20 - Meet at 1 to set up experiment (if possible stay for 1 hour after dinner for debrief)
Sept 2 - Work on Written documents - pre/post, handouts, etcs
Sept 4
Sept 9
Sept 11 - Final walkthrough of schedule - last minute checklist
Sept 15 - Meet During the day to set up inquiry

10 Students

Content Goals
- Tier 1 - All students should reach these
  - Conservation of Energy
  - Natural Frequencies & Resonance
- Tier 2 - Specific goals students will reach depending on their questions
  - Friction
  - Periods & Beat Frequencies
- Tier 3+ - Goals for experienced students
  - Normal Modes - what would the students need to address this
  - Transition to Chaos - this is fairly far out there
- Other Brainstormed Ideas
  - Degrees of Freedom - Address this in synthesis w/ controlling parameters
Process Goals

Introduction Mini-Lecture (15 min)
- Asking questions, self-reflection, recording observations, frustration (< 5min) Help the students become more comfortable, make them aware of possibility of frustration so they can deal with it better, encourage the students to be self-reflective
- Prompt: Take a minute and write down a few things you think you know about Pendulums (1min). Share out (5 min) - Encourage students to think about prior knowledge, allow us to asses the student's prior knowledge. Encourage the students to communicate with the group in a safe way (having had the opportunity to think by themselves)
- Why pendulums? (< 5min) - Allow us to motivate pendulums now that they had thought a little about them
  - Key points: Pendulums are models for other systems, we are surrounded by them, complex/coupled pendulums are probably new to many students
Starters - Example Pendulums (~15 min)
- Coupled Pendulum (two pendulums connected by some means)
  - Demo equal weight pendulum. Possibly demo doubling the mass on one of the bobs.
- Double Pendulum (one pendulum at the bottom of the other)
  - Show a (stiff) pendulum. Change the location of the mass on the lower part. (Note Friction & Rotation are problems!)
  - This one is more difficult - what can the students get out of this? Does it go along with our content goals
Pendulum Play Time & Question strips (~20 min)
Student Questions
Break (~15 min)
Gallery Walk - Choose Groups (~10 min)

Materials
- String: fishing line, nylon, yarn
- Weights: Coins, balls, washers, clay, balloon
- Springs
- Rods: Pencils, light dowels, metal hangers cut up, straws
- Connectors: Tape, Paperclips, Rubber bands, alligator clips
- Measuring Equipment: Stop Watches, Rulers
- Scissors
Early Stage Investigation (~30 min)
- Look to make sure the students are:
  - Refining their Question
  - Isolating Parameters
  - Starting to think about how record data / be systematic
- Problems the students might run into & Facilitation Techniques
Mid Stage Investigation (~1 hr)
- Look to make sure the students are:
  - Each students has a good understanding of their question and how they are approaching it
  - Students feel like they are progressing
- Problems the students might run into & Facilitation Techniques
- Pair-Shares
- Written midpoint assessment
  - Possible Prompt: What is your group's question? How have you decided to address it?
Thinking Tool (~15 min)
- Resonance: Tuning forks, wine glasses, weights on dowels
End Stage Investigation (~30 min)
- Look to make sure the students:
  - Each group feels like they have something to present
  - All group members are comfortable w/ results
- Problems the students might run into & Facilitation Techniques

Rubrics (<10 min)
- Give the students the rubrics they will use to evaluate each other & go over them do we want to give them a rubric?
Presentation Work Time (~30 min)
Presentations (5min? x N groups) (~30 - 45min)
Synthesis (~20 min)
- Show broader applicability
Re-work Posters (~15 min)