NSTA Annual Conference March 29, 2012 Kristen Kohli

Kristen Kohli – Estrella Foothills High School

 Broad appeal  Gives students a chance to explore a variety of sciences:  Chemistry  Biology  Physics  Earth Science  Increase engagement & inquiry in science

 NSTA Conferences  Textbook evaluations  State standards  Online resources    Available resources

 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

 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

 Iodine demo  10 cards  Dust & match  Virtual labs at learn.genetics.edu  Gel electrophoresis  Blood typing  Spatter patterns & trigonometry

 Determining driver using autopsy  Dermestid beetles  Visible Proofs activities:  Stomach content lab  PBS Crime Scene Creatures website & Body Farm  Forensic anthropology & facial reconstruction webquest

 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

 Tool marks & Play-Doh  Mikrosil casts  Turkey bone marks  Collecting cartridge casings  Firearmsid.com  Trajectory & trigonometry – Kennedy clip

 Day One:  Project introduced  Groups of four  Ten minutes to determine roles for 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

 Evidence at the Scene: Blood/Impressions/Soil

 Evidence at the Scene: Hair  Victim  Girlfriend (perpetrator)  Guinea pig

 Evidence at the Scene: Glass & Fingerprint

 Evidence at the Scene: Bullet casing & fingerprint

 Evidence at the Scene: Acetate cloth with lily pollen

 Evidence at the Scene: Bullet hole

 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

 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

 Guest speakers  FBI  SRO  Parents  Grants

Kristen Kohli