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.







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