Safety • Teachers are expected to • Protect health, welfare, & safety of their students • Foresee reasonable consequences of actions and inactions of students • Carefully instruct student on potential hazards
This all adds up to: • Showing good faith and due diligence in laboratory procedures. • Most law suites are based on negligence.
The negligence is not always the fault of the teacher: • Dana Center's data suggest that when the number of students in laboratories surpasses 24, the frequency of accidents triples. • District is responsible for providing and keeping all safety equipment in working order. • What do you do with a student that has a difficult time staying focused and is disruptive?
General Safety Responsibilities • Supervising Students • Providing adequate instruction • Informing students of potential risk • Providing safe lab facilities • Maintaining equipment in proper working order
In The Lab • MSDS Information • No entry Signs to Storage • Post Rules • Every lab should start with a safety review • Every student needs to have signed a safety contract
Use Consistency in your Safety Routines • Goggles • Aprons • Hair • Shoes • Fume Hoods
When you follow some basic steps, you create: Mutual Responsibility
Working with Glass • Hot glass looks like cold glass • Always check for cracks • Watch out for the edge of the table • Every lab should have broom and dust pan • Designate a broken glass bin (box)
Working with Heat • Heat test tube at an angle to prevent vapor accumulation and always point it away from people. • Do not heat a closed container: Stuff top with lab tissue • Use a water bath to heat volatile or flammable solvents
Safety Equipment • Eye Wash/Body Wash
Safety Equipment • Fire Blanket • Uses • Student • Modesty cover • Chemical spills
Safety Equipment • Fire Extinguisher Do you know what type you have? • Break the seal
Safety Equipment • First Aid Kits • Make sure that they are replenished yearly
Accidents Happen • Begin safety procedure: • Eye Wash - Fire Blanket • Body Wash • Remove all “unaffected” Students from the room • Call Nurse • Notify Administration
Lab Management Chemical Handling, Storage and DisposalFrom Cradle to Grave
Working with Chemicals • Label all containers • Only mix what you need: instead of mL, use drops. • Avoid cross contamination • Use wax paper on balance • Have a separate pipette or spatula for each beaker • Never pour un-used chemicals back into original containers • Read labels twice to avoid confusion and mistakes
Working with Chemicals • Students and teacher should always wear goggles and aprons when working with chemicals. • Keep hands, lab instruments, and chemicals away from mouth and eyes. • Never let chemicals leave the lab
Chemical Disposal • This is not an advertisement: • Flinn Scientific has a reference section in the back of their catalog: examples include • Organic Acid Halides • Alkali Metals and Alkaline Earth Metals • Silver Compounds • Oxidizing Agents • Reducing Agents • Organic and Inorganic substances
Biological Hazards • Products that are potentially contaminated with microorganisms have two major disposal methods: • Autoclaving (pressure cooker) • Chemical Sterilization (bleach) Again; found in Flinn
Flinn Resources • You can call Flinn if: • You are unsure of a lab procedure • You need assistance with a disposal method • You are unsure of how to mix a solution • You need a storage method
Discussion Questions • What do you do with a student that has a difficult time staying focused and is disruptive?
How Can the District Science Department Help You? Any Ideas? • Ask administrators to consider safety and class size while building master schedule • Concerns that the Middle Schools do not have exhaust systems in the labs. (not a vent hood but a complete room exhaust) • Some schools have labs that do not have eye washing capabilities • Members requested a Lab Safety training for the administrators and counselors. • % of inclusion students labs, some are up to 70% with no co-teacher
Would you like to be part of a committee? The SBISD Lab Safety Manual needs to be reviewed and updated.