This is a 41 page presentation that I created over the years for my forensic science class, AND an 11 page student note-taking / study guide to fill in as you teach. It includes sections on general toxicology, drugs, poisons and alcohol. There are examples of blood alcohol calculations, with each step animated so that you can teach it one step at a time or so that students can work through the problems during the presentation and then you can reveal the answers. Additionally, there are two shor