Thursday August 25, 2011 (Video - Workshop Safety Chemistry Laboratory; Lab Safety Rules, Laboratory Classroom Scavenger Hunt; Flinn Scientific's Student Safety Contract)

Please pick up a Flinn Scientific's Student Safety Contract, proceed to your desk, and begin reading this form. Also, get a calculator. Bell Ringer Thursday,

None today Announcements

Assignment Currently Open Notebook Page Date of Notes on Website Date IssuedDate Due Chemistry Class Information SheetN/A 8/248/25 Chemistry Class Procedures and Expectations TBD8/248/26 Chemistry BinderN/A 8/248/29

Today’s Objectives  We will get an overview of safety issues that are specific to the classroom where you will do your laboratory investigations.

Video Workshop Safety: Chemistry Laboratory Play

Discussion What is an acceptable safety goal for your chemistry laboratory? For instance, would a 90% safety ratio be acceptable? I need to set a goal for the percent of my students that will avoid a serious accident during my teaching career. What do your think is an acceptable or realistic percentage? Here’s some math as it applies to my schedule:

Discussion I have 5 chemistry classes per day. I have an average of 24 students per class. When I retire, I will have taught chemistry for 20 years. So, the total number of students taught in a career would be: 5 x 24 x 20 = 2400 students What do you think would be an acceptable safety goal for my career, as a percent of student that would leave my class at the end of the year without being injured? In my chemistry-teaching career, if just 1 student got seriously injured in my lab, my safety percentage would be: 2399 / 2400 = % That is very good unless… … you are that one student who was seriously injured! Let’s translate your answers into the actual number of students that would be seriously hurt (eye damage, burns, etc.) in my lab. For example, if you said an acceptable safety goal would be 95%: 1.00 –.95 = 0.05 x 2400 = 120 students seriously injured Is this an acceptable safety goal? What is the only acceptable safety goal? 100%.

Discussion Let’s come up with some rules that must be followed when we’re conducting laboratory investigations in this classroom? Who has their laptop and will volunteer to be our scribe?

Activity Everyone get a copy of the Laboratory Classroom Scavenger Hunt form. You have 10 minutes to walk around the room and fill in the handout about the safety equipment in the lab. After 10 minutes, return to your seats. Who found at least 4 things on their hunt? Who found 7 things on their hunt? Any volunteers to discuss one piece of equipment and show us where it is located in the lab?

Wrap Up Scribe: please turn in our safety rules. Everyone: please turn in your scavenger hunt forms.

Homework Flinn Scientific's Student Safety Contract: Read, sign, get parents signature, and return the contract by Monday. You will get back the contract itself to put into your chemistry notebook.