Health Science Content and Skills
Domain 4: Health Science Content and Skills
This domain tests the health content a health science teacher must know and the skills students are expected to practice. Expect items on body systems, growth and development, mental health, injury prevention, first aid, environmental and consumer health, and the National Health Education Standards.
Body systems, growth, and development
- Major systems: cardiovascular, respiratory, nervous, endocrine, immune/lymphatic, digestive, musculoskeletal, integumentary, urinary, and reproductive. Homeostasis is maintained by feedback loops-negative feedback reverses a change; positive feedback amplifies it.
- Development includes physical, cognitive, and psychosocial domains. Puberty timing varies widely; developmental appropriateness means matching content and expectations to students' stage, not just age.
Mental and emotional health
- Stress responses, coping skills, resilience, and protective factors. Warning signs of depression or suicide risk include withdrawal, hopelessness, giving away possessions, and sudden calm after distress. Schools use protocols such as QPR (question, persuade, refer) and 988 Suicide & Crisis Lifeline.
- Reduce stigma and encourage help-seeking.
Injury and violence prevention
- Unintentional injury is the leading cause of death for ages 1–44 in the U.S. Prevention: seat belts, helmets, child safety seats, poisoning storage, drowning supervision, firearm safety.
- Concussion: remove from play, evaluate, return gradually.
- CPR: compressions at 100–120/min, depth at least 2 inches for adults, about 1.5 inches for children, one-third chest depth for infants; ratio 30:2 for single rescuer; AED as soon as available. Choking: back blows and abdominal thrusts for conscious adults/children; infant back slaps and chest thrusts.
Environmental and consumer health
- Food safety: clean, separate, cook, chill; poultry to 165°F. Air and water quality, lead, pesticides, climate-related hazards.
- Consumer health: quackery warning signs (miracle cure, secret formula, testimonials), evaluating sources, understanding insurance.
Health skills
- National Health Education Standards include accessing valid information, analyzing influences, interpersonal communication, decision-making, goal-setting, self-management, and advocacy. Skills practice should be interactive and assessed, not only lecture.
Worked example
A 16-year-old collapses in gym, is unresponsive, and is not breathing normally. Activate EMS and get an AED, start chest compressions at 100–120/min with a depth of at least 2 inches, allow full recoil, minimize interruptions, and use the AED when it arrives. Reasoning: in sudden collapse, circulation is the priority; high-quality compressions maintain perfusion, and early defibrillation addresses a shockable rhythm.
Traps that cost marks
- Confusing compression depth or rate for adults, children, and infants.
- Treating a concussion as minor and returning an athlete to play the same day.
- Presenting health education as factual lecture only; skills must be practiced.
- Confusing leading causes of death for youth with those for older adults.
- Missing mandated reporting or confidentiality rules when a student discloses harm.