safety in science psed 446/546 teaching of science
TRANSCRIPT
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Safety in ScienceSafety in Science
PSED 446/546
Teaching of Science
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The current state of science The current state of science safetysafety
Seventy percent of all high school science accidents occur at the ninth grade level. According to teachers, the number one reason for accidents occurring in the science lab was "students' failure to carefully read and understand laboratory activity instructions." (from Flinn Scientific website)
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Main Sources of InfoMain Sources of Info
There are two main sources of information:1. CSSS Science & Safety
2. The Safety Book (not available online)
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Flinn ScientificFlinn Scientific
Flinn Scientific is also a good resource (especiall for chemistry and biology), as they have numerous resources on Science Safety:
Steps You Can Take to Prove You're a "Responsible" Science Teacher
General Safety Rules for Science Teachers Safety Pages Student Teacher's Survival Kit (which contains
safety contracts and posters)
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Other Sources of InformationOther Sources of Information
Safe Science Series from NSELA The NSTA provided middle schooland high schoolsafety
information in a past edition of Science Class (distributed through e-mail; to sign up for delivery, click here).
The Laboratory Safety Institute has a bunch of resources and information; click on "Free" for safety contracts, checklists, etc.
An NBC News report on chemicals in the classroom. NYC Science Safety Manual (K-12) (requires free
registration) OSHA MSDS
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Three AspectsThree Aspects
Student Safety Guidelines (for students)– Activities– Guidelines
Teacher Safety Guidelines (for teachers) School Safety Guidelines (for schools)
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Student Safety ActivitiesStudent Safety Activities
See Flinn Scientific's Safety Page, with links to high school and middle school safety contracts and exams (English and Spanish). I am ordering Flinn's Student Teacher's Survival Kit (which contains safety contracts and posters).
Activities may include the following: learn rules equipment identification practice procedures safety quiz safety contract safety posters
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Student Safety GuidelinesStudent Safety Guidelines
The "rules" will vary from class to class. Here are some subject-specific safety concerns, organized by subject.
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General ScienceGeneral Science
Glassware Heat/fires Sharp instruments Animals
– Gerbils and giardia, salmonella, E. coli– Guinea pigs, rabbits and dander
Allergies– carpets, mold, latex, peanuts, etc.
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PhysicsPhysics
Electrical (avoid wet hands and metal objects)
Radiation Lasers and Light Mechanical Dangers
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Earth ScienceEarth Science
Handling rocks– wear goggles when crushing rocks– wrap rocks in cloth before crushing– Wear gloves– Take care when lifting heavy rocks
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Earth Science (continued)Earth Science (continued)
Field trips– no open-ended shoes or sandals
– long pants
– gloves
– watch for polluted soil Dust Tasting Use only appropriate tools
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BiologyBiology
Be careful with– live animals– dissections (scalpels; gloves)– syringes– body fluids
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Biology (continued)Biology (continued)
Field trips– prohibited areas– clothing– plants to avoid– touching animals (dead or alive)– eating plants
Microscopes
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ChemistryChemistry
Clean spills immediately Avoid loose or long-sleeve clothing Wash hands
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Chemistry (continued)Chemistry (continued)
Burners – use Bunsen or hot plates (rather than alcohol) – light match and then slowly turn on gas – always use open vessels – point tube away when heating – remove from flame only with proper utensils
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Chemistry (continued)Chemistry (continued)
Test tubes – inserting stoppers into glass tubes (lubricate
with glycerin) – clean used test tubes – Dilute acids by adding acid to water (pour acid
along stirring rod)
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Teacher Safety GuidelinesTeacher Safety Guidelines
There are three duties of a teacher (known as “foreseeability”)
Instruct Supervise Maintain equipment (and records)See CSSS publication “Science & Safety”
(What are my legal responsibilities as a science teacher relating to negligence?)
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Exercise common senseExercise common sense
It is important to exercise "common sense": See page 2 of Science & Safety
One is not ‘negligent’ unless they fail to exercise that degree would be exercised by a person of ordinary prudence under all the existing circumstances in view of probable danger of injury.’ The law basically requires teachers to be reasonable and use good common sense. Teachers are required to exercise the skill and training which would ordinarily be expected from someone in their profession.
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Criteria to judge negligenceCriteria to judge negligence
Was the teacher involved expected to supervise?
Was the teacher derelict in this duty? Did a personal injury accident occur? Was the failure to exercise reasonable care
the direct cause of the injury?
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NSTA Position StatementsNSTA Position Statements
Read the NSTA Position Statements on Safety and School Science Instruction, which lists guidelines for teachers and school districts, and Liability (biology teachers can also read NABT's statement on the Role of Laboratory and Field Instruction in Biology Education)
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AnimalsAnimals
If you plan on using animals in your classroom,
• For guidelines on the proper use of animals in the classroom, check out guidelines put out by the NABT and the NSTA.
• Read the Ten Principles for the Use of Animals for Insturctional Purposes (Institute of Laboratory Animal Resources)
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OtherOther
Check out Steps You Can Take to Prove You're a "Responsible" Science Teacher and General Safety Rules for Science Teachers.
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Subject-specific Areas of Subject-specific Areas of ConcernConcern
Electrical issues Biological material Chemicals
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Electrical IssuesElectrical Issues
know the voltage and current (and mark it) shortest extension cords, insulated do not permit students to service equipment periodically check outlets watch that the equipment doesn’t hot use low-voltage/current sources where
possible
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Biological materialBiological material
No:– no cell or tissue labs– no blood labs– no mold or bacteria cultures (unless the
students are very skilled and the culture vessels are securely sealed)
(from NSTA Web Institute)
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ChemicalsChemicals
Consider microchemistry whenever possible to minimize risk, need for supplies, and cost of cleanup/disposal
No explosions Never bring stock bottles into classroom store by chemical type (not alphabetically) store large bottles near the floor inspect annually use ladders or stools to get to chemicals above eye
level
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Chemicals (continued)Chemicals (continued)
chemicals must be secured store metallic sodium and potassium in kerosene or heavy
mineral oil use red phosphorus instead of white whenever permissible No poisonous chemicals
– benzene, arsenic, asbestos – formaldehyde, carbon tetrachloride, phenol, xylene, lead
compounds Disposing of chemicals
– do not dump strong acids or flammable liquids down a drain (dilute first) or those that produce odors
– if in doubt, ask supplier or NSTA
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School Safety GuidelinesSchool Safety Guidelines
General equipment requirements are listed at the Flinn website ("5-minute equipment guide“) and page 10 of Science & Safety.
Examples of equipment are as follows: First-aid kits ABC Fire extinguishers (special types if
necessary) Fire blankets Safety showers/eye wash Sand buckets
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School Equipment (cont)School Equipment (cont)
gas and electrical master controls – electrical outlets– gas leaks
Congestion/evacuation concerns Storage Area Smoke/heat detectors Mercury clean-up kits
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GogglesGoggles
See pages 119-124 of Safety Book “Splash” type Seal comfortably to the face Ventilated (to prevent fogging) No scratches deeper than a fingernail Cleaned regularly Individual goggles best
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Contact lensesContact lenses
Additional regulation regarding use of contact lenses is unnecessary (OSHA)
Wear non-vented, specially marked safety goggles
Teacher should know who is wearing contact lenses as neutralizing solutions should not be used to flush eyes
Avoid activities that generate fumes
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NSTA GuidelinesNSTA Guidelines
See page 12 of Science & Safety max class size 24 students 60 ft2 per student (combination) 45 ft2 per student (lab only) 6 ft per student (work space)
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NSTA Guidelines (cont)NSTA Guidelines (cont)
GFCI 1 pair approved safety goggles per student 2 outward-opening exits (accom.
wheelchairs) locked doors on storerooms
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SummarySummary
Know your responsibilities Be aware of safety issues Teach safety precautions Keep up-to-date
– NSTA Conventions – Courses (Jason Academy
http://www.jason.org/jason_academy/courses/course_descriptions.htm#safety )