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CSI: Classroom Premeditated Precalculus

CSI: Classroom Premeditated Precalculus. Produced by: Beth Bos Pamela Tobe. CSI Unit Developed from:. http://falconnet.peddie.org/faculty/ilyublinskaya/index.html Vandalism 101

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CSI: Classroom Premeditated Precalculus

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  1. CSI: ClassroomPremeditated Precalculus Produced by: Beth Bos Pamela Tobe

  2. CSI Unit Developed from: • http://falconnet.peddie.org/faculty/ilyublinskaya/index.html Vandalism 101 This is one of a series of units that requires students to think creatively, analyze critically and problem solve in a group environment.

  3. Vandalism 101 • Scenario: Students and teachers arrive at a high school where the night before vandals used black paint to scrawl offensive phrases and pictures on school front entry and entry sidewalk . • Clues: Footprints from spilled paint extending 10 strides from origin.

  4. Interviews have established 3 prime suspects • Emily, a 15 years old, 5’1”, 9th grader at the HS who had received an in school suspension for inappropriate “art” work. • Mr. McCauley, a 20 year old, 6’3” substitute who was just fired for his inability to control the class. • Phillip, a 16 year old, 5’7”, 10th grader who was suspended for smoking and selling cigarettes on campus.

  5. Stride Pattern Analysis Laboratory • Objective: critically analyze stride pattern found at crime scene and compare to prime suspects. • Materials Needed: Computer with Geometer’s Sketchpad, TI-83, CBR, link cable and graph link, tape measure, poster board and photo evidence from crime scene. • Student Handouts: walking and running stride data, stride and height exploration, stride length and speed as related to height

  6. 111.35. Precalculus TEKS Covered • c(3)A,B,C,D; c(4)A,B; c(6) A,B • Record of activities will include data collection records from CBR and GSP represented in tables, graphically and symbolically. • Analysis of data will include an oral and written report summarizing the data and rationale for conclusions. • Discussion on the importance of error in regression, role of repetition, controls and variables.

  7. Photographic Evidence

  8. Converting Photograph of Footprints to Stride Length

  9. Creating Reference Data

  10. Use to Compare to Strides Found at Crime Scene Stride vs Height

  11. Jake’s Run and Walk • Walk • y = 1.29x -.87 • Slope: 1.29 • Run • y = 1.728x -.135 • Slope: 1.73

  12. Stride Data Walking

  13. Stride Data Running

  14. Stride vs. Height Stride vs. Height

  15. Perpetrator stride between 1 – 1.32 m • Perpetrator is Phillip who stand 5’7” or 1.7 m

  16. Slope: 1.8 Speed of perpetrator: 1.8 Y = 4.615x2 - 17.12x + 17.6

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