Page 25 - Suite Teaching Timeline
P. 25
Gunshot Residue
Teaching Timeline
DAY 2
This lab schedule is designed to take 4
days, with 45 minutes of class time per day.
Review the lab procedures and the data
collection sheet. Emphasize that when
students add the diphenylamine solution, they
DAY 1 must observe the swab immediately. The acid
will cause the swab to turn black in a short
Cover the background material on Gunshot period of time, which will obscure the results.
Residue.
Instruct students to follow the lab procedures
Distribute lab procedures and review them for Lab 1. They should fill out their data
to ensure students are prepared for the lab. collection sheet for this lab by the end of class.
Assign pre-lab questions for homework. Discuss student results.
THE MYSTERY OF LYLE AND LOUISE 25
