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Increasing Inquiry with Forensics

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... DNA, & Blood 3 weeks Lessons from the Body (death, forensic entomology, forensic ... Weapons & Tools ... Armed with digital camera ... – PowerPoint PPT presentation

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Title: Increasing Inquiry with Forensics


1
Increasing Inquiry with Forensics
  • NSTA Annual Conference
  • March 29, 2012
  • Kristen Kohli

2
Background Information
  • Kristen Kohli kkohli_at_buhsd.org
  • Estrella Foothills High School
  • http//www.kohliscience.com

3
Why Forensics?
  • Broad appeal
  • Gives students a chance to explore a variety of
    sciences
  • Chemistry
  • Biology
  • Physics
  • Earth Science
  • Increase engagement inquiry in science

4
Initial Planning
  • NSTA Conferences
  • Textbook evaluations
  • State standards
  • Online resources
  • http//bsapp.com/forensics_illustrated/
  • http//www.theforensicteacher.com
  • Available resources

5
Course Layout
  • Introductory Unit 1 week
  • Common Trace Evidence (hair, fibers, pollen,
    spores, sand, soil) 3 weeks
  • Fingerprints, DNA, Blood 3 weeks
  • Lessons from the Body (death, forensic
    entomology, forensic anthropology)- 2 ½ weeks
  • At the Scene (glass, impressions, accident
    reconstruction) 2 ½ weeks
  • Weapons Tools 2 weeks
  • Summative Crime Scene Project 1 week
  • Case studies careers in all units

6
Trace Evidence Unit
  • Collecting materials
  • Hair
  • Pollen/spores
  • Sand/Soil
  • Introductory inquiry activities
  • ID differences
  • Unknown samples
  • Direct instruction
  • Application
  • How to photograph
  • Polymer worm demo
  • Burn lab
  • Soil/sand lab

7
Fingerprints, DNA, Blood
  • Iodine demo
  • 10 cards
  • Dust match
  • Virtual labs at learn.genetics.edu
  • Gel electrophoresis
  • Blood typing
  • Spatter patterns trigonometry

8
Lessons from the Body
  • Determining driver using autopsy
  • Dermestid beetles
  • Visible Proofs activities http//www.nlm.nih.gov
    /visibleproofs/
  • Stomach content lab
  • PBS Crime Scene Creatures website Body Farm
  • Forensic anthropology facial reconstruction
    webquest

9
At the Scene
  • Obtaining glass samples
  • Glass density lab
  • Water bead demo
  • Becke lines submersion tests
  • Youtube clips on breaking glass
  • Casting shoe prints comparing
  • Do-it yourself drag sled
  • Crash reconstruction at Edheads.org
  • Styrofoam plate bite comparisons

10
Weapons Tools
  • Tool marks Play-Doh
  • Mikrosil casts
  • Turkey bone marks
  • Collecting cartridge casings
  • Firearmsid.com
  • Trajectory trigonometry Kennedy clip

11
Summative Project Final Crime Scene
  • Day One
  • Project introduced
  • Groups of four
  • Ten minutes to determine roles for scene

12
Summative Project Final Crime Scene
  • Day Two Visit the scene
  • Ten minutes per group
  • Armed with digital camera
  • Supplies available at scene
  • Measurement tools calipers, meter sticks,
    metric wheels
  • Evidence bags, labels, numbers, bindle paper,
    tape
  • Trajectory rods, protractors, string
  • Forceps, gloves, tape
  • Order tests, samples, info

13
Summative Project Final Crime Scene
  • Evidence at the Scene Blood/Impressions/Soil

14
Summative Project Final Crime Scene
  • Evidence at the Scene Hair
  • Victim
  • Girlfriend (perpetrator)
  • Guinea pig

15
Summative Project Final Crime Scene
  • Evidence at the Scene Glass Fingerprint

16
Summative Project Final Crime Scene
  • Evidence at the Scene Bullet casing
    fingerprint

17
Summative Project Final Crime Scene
  • Evidence at the Scene
    Acetate cloth with lily pollen

18
Summative Project Final Crime Scene
  • Evidence at the Scene Bullet hole

19
Summative Project Final Crime Scene
  • Day Three Science lab
  • Femur pelvis evidence
  • Test results
  • Self-directed
  • Supplies light microscopes, dissecting
    microscopes, rulers, dusting powder and brushes,
    liquids with refractive indices of 1.33 and 1.47,
    slides, coverslips, tape, candles, forceps,
    magnifying glasses, watch glasses, test tubes,
    clear nail polish, hydrochloric acid, acetone,
    magnets, barium chloride, acetic acid, UV light,
    petri dishes, and mortar and pestles sets
  • Additional test/info requests

20
Summative Project Final Crime Scene
  • Day Four Computer lab
  • Final lab request results
  • Time to prepare Power Points
  • Assessment
  • Chain of custody
  • Sketch of scene
  • Careful crime scene teamwork
  • Safe lab work knowledge of testing procedures
  • Evidence collection , testing, correct analysis
  • Presentation of findings

21
Ask For Help
  • Guest speakers
  • FBI
  • SRO
  • Parents
  • Grants

22
Contact Information
  • Kristen Kohli
  • kkohli_at_buhsd.org
  • http//www.kohliscience.com
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