Lesson 4: Lab Safety
Duration of Days: 1
Lesson Objective
Students will be able to independently apply laboratory safety protocols, evaluate risk in scientific investigations, and justify the appropriate use of safety equipment and procedures to ensure safe, accurate, and reliable data collection in all lab environments.
-Why are lab safety procedures essential for scientific investigation?
-How do scientists assess and minimize risk before conducting experiments?
-How does proper use of safety equipment impact the reliability of scientific work?
-What responsibilities do scientists have in maintaining a safe lab environment?
-How can unsafe procedures affect data quality and experimental outcomes?
Lab safety
Risk assessment
Hazard
Safety data sheet (SDS)
Personal protective equipment (PPE)
Goggles
Gloves
Lab apron
Emergency procedures
Chemical safety
Biological safety
Physical hazard
Proper disposal
HS-ETS1-1 – Evaluate constraints and risks in scientific and engineering design
HS-PS3-1 – Apply safe procedures when collecting and analyzing data in systems
NGSS Crosscutting Concepts
-Cause and Effect
-Systems and System Models
-Stability and Change
Students will interpret lab scenarios and identify safety risks and correct procedures.
Students will analyze procedural descriptions and determine compliance with scientific safety standards.
Students will evaluate cause-and-effect relationships between unsafe practices and experimental outcomes.
Students will evaluate laboratory scenarios involving both safe and unsafe practices, identify potential risks, and propose corrective actions. They will be expected to justify safety decisions rather than simply recall rules, emphasizing scientific responsibility and risk evaluation.
Students will also connect safety practices to data integrity, understanding that unsafe procedures can compromise both human safety and experimental validity.
DOK Level: 2–3 (Skill Application to Strategic Reasoning)
Lab safety principles apply in medical laboratories, engineering workplaces, industrial settings, and environmental fieldwork.
Students will explore how safety protocols protect workers in real scientific careers and how regulations ensure public safety.
Students will connect lab safety to everyday environments involving chemicals, electricity, and biological materials.
Students may believe safety rules are optional or only relevant for “dangerous” labs.
Students may underestimate the consequences of minor safety violations.
Students may think PPE is only required for teacher-directed labs rather than all investigations.
Students may confuse different types of hazards and appropriate responses.
-Scenario-based safety decision tasks at varying complexity levels
-Visual hazard identification supports (icons and lab signage interpretation)
-Role-play or simulation of lab safety procedures
-Checklists for risk assessment before experiments
-Peer review of safety procedures in experimental design
-Safety scenario assessment identifying risks and corrections
-Quiz on PPE and lab safety procedures
-Performance evaluation during lab setup and participation
-CER explanation of how safety impacts data quality and reliability
-Formative checks during safety simulations
Lab safety contract and guidelines
PPE (goggles, gloves, aprons)
Safety signage and hazard symbols
Scenario-based worksheets
SDS examples (simplified for student use)
Lab setup demonstrations