The school-age years (about 6 to 12 years) are a period of steady physical growth, logical thinking, and social competence. The world widens from home to school, peers, teams, and clubs. Children master skills, compare themselves with others, and build self-esteem through achievement. The period ends with the onset of puberty (prepubescence), which comes earlier in girls than in boys.
Physical growth
| Parameter | Typical pattern |
|---|
| Height | Grows about 5–6 cm (2 in) per year; steady until the prepubertal growth spurt |
| Weight | Gains about 2–3 kg (4.5–6.5 lb) per year; weight nearly doubles between ages 6 and 12 |
| Body | Longer legs, lower center of gravity, better balance and coordination; muscles stronger but still immature |
| Teeth | Permanent teeth begin at about 6 years — usually the first permanent molars and lower central incisors first, then upper central and lateral incisors (7–8 years), canines and premolars (9–12 years), and second molars (about 12 years) |
| Puberty | Girls often begin breast development at about 8–13 years; boys begin testicular enlargement at about 9–14 years |
Height reflects long-term nutrition and health well — chronic illness or undernutrition slows linear growth, while weight responds more to short-term changes.
Motor skills
- Gross motor: rides a bicycle without training wheels, jumps rope, swims, skates, throws and catches accurately; performance improves with practice
- Fine motor: neat handwriting, drawing detail, cutting straight and curved lines with scissors, building models, playing instruments
- Basic movements become automatic, so complex sports skills can be learned
Cognitive (Piaget — concrete operational, about 7–11 years)
| Ability | Example |
|---|
| Conservation | Knows that clay reshaped into a long roll weighs the same (number conserved first, then mass, weight, and volume) |
| Reversibility | Can mentally undo an action (pour water back into the first glass) |
| Classification | Understands that red beads are part of a larger class of all beads (class inclusion) |
| Seriation | Arranges sticks in order of length |
| Decentering | Considers more than one aspect and other people's viewpoints — can cooperate in groups |
| Relational thinking | Understands "I am my brother's sister" |
| Limits | Logic applies to concrete, real objects and events; abstract and hypothetical reasoning comes later |
Understanding of illness moves from magical explanations to concrete physical causes (germs, injury). By about 9–10 years most children understand that death is permanent, universal, and irreversible.
Psychosocial
- Erikson: industry vs. inferiority — pride in completing tasks, learning skills, and being productive; repeated failure or harsh comparison leads to inferiority
- Freud: latency — energy goes to learning, skills, and same-sex friendships
- Play: cooperative — organized games with rules, teams, competition, and roles; collections and hobbies; clubs
- Peers become very important; children learn cooperation, competition, rule-following, and leadership in groups
- Moral development: Kohlberg's conventional level develops (being a "good" child, then respecting rules and authority); rules are now understood as agreements (Piaget's autonomous morality) and intentions matter
- Common fears: school failure, ridicule by peers, physical injury, natural disasters, and loss of a parent — more realistic than the monsters of early childhood
- Self-concept forms from school performance, peer acceptance, family support, and body image; late school-age children are sensitive to comments about their changing bodies
- Yearly height and weight on growth charts; BMI interpreted by age- and sex-specific percentiles (not adult BMI cut-points):
| BMI-for-age percentile | Category |
|---|
| Below the 5th | Underweight |
| 5th to below the 85th | Healthy weight |
| 85th to below the 95th | Overweight |
| 95th or above | Obesity (severe obesity at 120% or more of the 95th percentile) |
- Blood pressure yearly
- Vision with a letter chart at the distance it is designed for (3 m/10 ft or 6 m/20 ft) — myopia often appears in school years; hearing screening at school ages per schedule
- Dental examination; sealants on permanent molars
- Scoliosis screening where recommended (see Country Notes); lipid screening once between 9 and 11 years in the US
- Depression and anxiety screening begins in late school age (anxiety from 8 years in the US)
- Preparticipation physical evaluation before organized sports
Management is health promotion and early treatment of common problems.
Physical activity
- At least 60 minutes of moderate-to-vigorous activity daily, including muscle- and bone-strengthening activity at least 3 days per week
- Choose activities the child enjoys so they continue; emphasize participation and effort over winning
- Supervised resistance (strength) training with proper technique and light loads is safe and beneficial in school-age children once they can follow instructions (often from about 7–8 years); avoid maximal lifts and poor technique
- Warm-up before and cool-down after exercise; appropriate protective equipment
- Exercise-induced bronchoconstriction (asthma): use the prescribed inhaled short-acting beta2-agonist (e.g., albuterol/salbutamol) about 5–20 minutes before exercise; expect brief tremor and tachycardia; needing it often apart from exercise signals poor control and needs review; activity should not be restricted when asthma is controlled. SABA-only treatment is not recommended from 6 years (children need ICS-containing treatment); from 12 years, GINA prefers as-needed low-dose inhaled corticosteroid–formoterol as the pre-exercise reliever
Nutrition and weight
- Balanced diet with breakfast, fruits and vegetables, whole grains, and calcium; limit sugary drinks and fast food
- Obesity management is family-based: healthy eating, activity, sleep, and screen limits — not restrictive dieting
Sleep
- 9–12 hours per night for ages 6–12; regular bedtime; screens out of the bedroom. Growth hormone is released mainly during deep sleep
Dental
- Fluoride toothpaste twice daily, flossing, sealants on permanent molars, mouthguards for contact sports
Listed in priority order.
- Injury prevention — injuries remain the leading cause of death
- Booster seat until the adult seat belt fits (lap belt on upper thighs, shoulder belt across chest, knees bend at the seat edge) — usually at about 145 cm (4 ft 9 in), often 8–12 years; back seat until 13 years
- Bicycle helmets, reflective clothing, traffic rules; water safety and swimming skills
- Sports safety: protective gear, rules, recognizing concussion (remove from play, evaluate before return)
- Firearm safety; internet and online safety
- Hospitalized school-age child
- Main concerns: loss of control, pain, separation from school and friends, and fear of disability or death
- Explain procedures in advance using diagrams, models, and correct terms; answer questions honestly
- Give responsibility and choices (record intake, help with dressing changes); maintain schoolwork and contact with friends
- Protect privacy and modesty
- Encourage the child to put feelings into words
- Build industry and self-esteem: offer tasks at the right level of challenge, praise effort and progress, avoid comparison with siblings or peers, let the child solve problems
- Screen for vision problems, overweight, high BP, learning difficulties, bullying, anxiety, and depression
- Teach coping skills: combine problem-focused coping (planning, asking for help) and emotion-focused coping (talking, relaxation, physical activity)
- Promote healthy posture and ergonomics: stand with weight on both feet; chair height with feet flat and elbows at about 90° at the desk; monitor at or slightly below eye level
- Prepare for puberty: teach about body changes, menstruation, and hygiene before they begin
- Keep a regular routine for homework, activity, meals, and sleep
- Backpacks: use both shoulder straps; keep the loaded weight to about 10–20% of body weight
- Reading: good lighting and a comfortable distance (about 30 cm) from books; limit near-work marathons and encourage outdoor time, which is linked to lower myopia risk
- Screen time: set consistent family limits so screens do not displace sleep, activity, and homework
- Recognize and report bullying and cyberbullying; keep communication open
- Children home alone after school need clear rules, emergency numbers, and check-ins
- Talk about puberty, body safety, and substance use before adolescence
- Obesity (BMI at or above the 95th percentile) with high BP, acanthosis nigricans, sleep apnea, or type 2 diabetes
- Falling school performance, school refusal, withdrawal, or somatic complaints (headache, abdominal pain) — anxiety, depression, bullying, or learning disability
- Precocious puberty: breast development before 8 years in girls or testicular enlargement before 9 years in boys; no signs of puberty by 13 years in girls or 14 years in boys (delayed puberty) — endocrine evaluation
- Growth failure (height falling across percentiles)
- Frequent injuries, persistent headaches after head injury
- Suicidal talk at any age — take seriously
- School-age = 6–12 years; height ~5–6 cm/year, weight ~2–3 kg/year
- First permanent molars and lower central incisors erupt first (about 6 years)
- Industry vs. inferiority; latency; cooperative play with rules
- Concrete operations: conservation, reversibility, classification, seriation, decentering
- Conventional morality developing; intentions now matter
- Fears become realistic (school failure, injury, natural disasters)
- BMI by age and sex percentiles: 85th–95th overweight, ≥ 95th obesity
- 60 minutes of activity daily; choose enjoyable activities
- Supervised resistance training is safe with proper technique
- Exercise-induced asthma: inhaled bronchodilator before exercise, do not ban activity
- Sleep 9–12 hours
- Booster seat until about 145 cm; back seat until 13
- Hospitalized: fears loss of control and separation from peers — explain, give responsibility
Country Notes
United States
- Scoliosis screening: the USPSTF (2018) found insufficient evidence for or against routine screening of adolescents, while orthopedic and pediatric specialty societies support screening (girls at about 10 and 12 years, boys once at 13–14 years); follow local school policy.
- The US Physical Activity Guidelines recommend 60 minutes or more of daily activity for ages 6–17.
Philippines
- School-based immunization gives Td and MR in Grade 7 and HPV to girls in Grade 4 (2 doses one year apart) under the DOH National Immunization Program; check the child's record at school health visits.
- Republic Act 11229 requires child restraints for children 12 years and younger unless they are at least 150 cm tall.