School-Age Parenting: A Complete Guide to Ages 6–9

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The school-age years (ages 6–9) mark a dramatic shift: your child spends most of their day in school, friendships become increasingly important, academics become more formal and competitive, and your role shifts from constant hands-on care to homework supervisor, chauffeur, and advisor. During these years, your child is developing academic skills, navigating complex social hierarchies, building confidence or anxiety around learning, and establishing patterns of independence, responsibility, and leisure time that often persist into adulthood. While every child develops at their own pace, understanding typical developmental milestones, managing the school-to-home transition, supporting academic success, and recognizing when to seek help helps you support your child during this pivotal stage. This guide covers ages 6–9 with practical strategies for common challenges and realistic expectations for what's developmentally normal.

 

What It Is: Understanding the School-Age Stage

School-age and early elementary span ages 6–9 (roughly kindergarten through third grade, though ages vary by school system). It’s a distinct stage from preschool, characterized by:

  • Formal academic learning (reading, writing, math become skill-based and assessed)
  • School as social center (peers become critically important; much of day spent with same group)
  • Expanding independence (doing homework, managing belongings, navigating school rules)
  • Concrete operational thinking (thinking becomes more logical; understanding rules and fairness deeply)
  • Peer comparison (comparing themselves to classmates; anxiety about performance)
  • Friendship complexity (friendships becoming more intentional; social conflicts more sophisticated)
  • Screen time expanding (video games, YouTube, social media beginning)
  • Extracurricular involvement (sports, music, clubs become part of routine)
  • Body changes beginning (growth acceleration; some early puberty signs in older end of range)
  • Emotional regulation improving but still volatile (can articulate feelings; still impulsive)

This stage often involves the first major identity shift: from “family is center of universe” to “school/peers are equally or more important.” Parenting changes from directing behavior to coaching, supporting, and increasingly stepping back.


Typical Signs, Timeline, and Major Milestones

Ages 6–6.5: First Grade / Early School Adjustment

Physical Development:

  • Losing baby teeth; permanent teeth erupting (usually front bottom, then top)
  • Slight increase in height and weight gain
  • Better coordination; more refined motor skills
  • Can perform simple physical tasks (tie shoes, hold pencil correctly, cut accurately)
  • Sitting still for 20–30 minutes (though not always happily)
  • Handwriting becoming more controlled; letters more uniform

Academic Skills:

  • Reading emerging; may be able to decode simple words
  • Writing letters and simple words; copying words from board
  • Recognizing numbers, basic counting
  • Beginning simple addition/subtraction (with manipulatives)
  • Ability to follow multi-step directions; understanding classroom rules
  • Attention span adequate for academic lessons (though still benefit from movement/breaks)

Language & Thinking:

  • Speaking clearly; vocabulary expanding rapidly (1,500+ words in active use)
  • Understanding jokes and riddles (loves puns and wordplay)
  • Asking sophisticated questions; interested in “why” and “how”
  • Concrete operational thinking solidifying; understanding cause and effect, reversibility
  • Can plan simple tasks (organizing backpack, packing lunch)
  • Still thinking somewhat egocentrally; learning to consider others’ perspectives

Social & Emotional:

  • Transitioning from parallel play to cooperative play (true collaboration now standard)
  • Friendships becoming meaningful; may have one close friend or small group
  • Concerned with fairness; strict about rules
  • Shame and pride easily triggered; sensitive to criticism
  • Embarrassment about body, mistakes becoming apparent
  • School anxiety common during adjustment period (separation anxiety may reappear)
  • Still seeking adult approval; wanting to please

Behavior:

  • Complying with rules (at least when supervised)
  • Testing limits less intensely than preschool
  • Defiance less common; reasoning more effective
  • Tattling on peers common (rule enforcement is serious business)
  • More independent; can do self-care without reminding
  • Beginning to manage simple responsibilities (feeding pet, putting clothes in hamper)

Common Issues:

  • School adjustment anxiety: New environment, separation from parent, new social group
  • Academic struggle: If finding early academic learning difficult
  • Social challenges: Difficulty making friends or adjusting to peer group
  • Homework resistance: Early homework battles beginning
  • Sleep issues: School stress affecting sleep; nightmares possible

Ages 6.5–7.5: Settling In / Academic Demands Increasing

Physical Development:

  • Continued tooth loss/eruption (most children have lost ~4 baby teeth by age 7)
  • Noticeable height/weight increase (growth acceleration)
  • Improved coordination; many children interested in sports
  • Fine motor skills adequate for most school tasks
  • Sitting still becoming easier (though recess/movement still essential)

Academic Skills:

  • Reading becoming automatic for many children (though wide variation)
  • Writing expanding from single words to sentences
  • Addition and subtraction with understanding (not just memorization)
  • Beginning to apply academic skills (reading for information, writing for purpose)
  • Homework expected; may range from 10–20 minutes daily
  • Ability to follow complex instructions; organizing materials

Language & Thinking:

  • Vocabulary explosion; learning multiple new words daily
  • Sophisticated sentence structure
  • Understanding time concepts better (yesterday, tomorrow, weeks, months)
  • Logical thinking solidifying; less magical thinking
  • Beginning to understand different perspectives (“How would he feel?”)
  • Memory improving; can retain information from lessons
  • Metacognition emerging (thinking about thinking; awareness of own learning)

Social & Emotional:

  • Friendships more complex; best friends, groups, some exclusion beginning
  • Concern with fairness and rules intensifying
  • Peer comparison accelerating (grades, athletic ability, appearance)
  • Anxiety about academic performance beginning
  • Pride in accomplishments; sensitive to failure
  • Understanding and expressing complex emotions
  • Empathy and prosocial behavior solidifying
  • Social hierarchies becoming apparent (popularity awareness)

Behavior:

  • Cooperation generally good if expectations clear
  • Responsibility increasing; can manage simple chores
  • Independence expanding; more self-direction
  • Testing boundaries less; understanding rules more
  • Lying becoming rare (mostly when embarrassed or scared)
  • Impulse control improving but still limited
  • Competitiveness emerging in games and academics

Common Issues:

  • Homework battles: Resistance to homework; difficulty focusing; parent/child conflict over homework
  • Academic anxiety: Worry about grades, performance, comparisons with peers
  • Social anxiety: Worry about friendship, fitting in, being excluded
  • Perfectionism: Upset about grades, mistakes; anxiety about performance
  • Sports resistance or overcommitment: Either refusing activities or overcommitted schedule
  • Sleep disruption: Anxiety affecting sleep; too many activities affecting schedule

Ages 7.5–8.5: Peak School Years (Confident, Social, Academic)

Physical Development:

  • Most children have lost many baby teeth; permanent teeth mostly in
  • Noticeable growth (especially in spring/summer)
  • Improved athletic coordination; many children enjoying sports
  • Fine motor skills developed enough for all academic tasks
  • Can sit for 30–45 minutes without significant restlessness
  • Energy levels high; need for physical activity critical

Academic Skills:

  • Reading fluent for most children; reading for pleasure possible
  • Writing expanding to paragraphs and simple stories
  • Math skills solidifying; multiplication/division beginning (varies by curriculum)
  • Able to apply academic skills across subjects
  • Homework 20–30 minutes typical; developing responsibility for completion
  • Note-taking and organizational skills emerging
  • Critical thinking beginning (analyzing, questioning)

Language & Thinking:

  • Sophisticated vocabulary; beginning to use more complex language
  • Humor becoming more sophisticated (jokes, puns, irony)
  • Understanding abstract concepts (fairness, justice, loyalty)
  • Perspective-taking solidifying; understanding complex social situations
  • Time concepts clearer (seasons, years, historical time)
  • Planning and organizing improving
  • Metacognitive skills strong; aware of own learning and areas of difficulty

Social & Emotional:

  • Peer relationships complex; friend groups more defined
  • Friendship conflicts becoming more sophisticated (social manipulation, exclusion, gossip)
  • Popularity awareness high; concern about being liked
  • Social hierarchy well-understood
  • Empathy and moral understanding sophisticated
  • Emotional expression more nuanced
  • Anxiety about social situations and academic performance possible
  • Pride and embarrassment easily triggered
  • Beginning to have “crushes”; romantic interest emerging (or emerging soon)

Behavior:

  • General cooperation good if expectations clear
  • Responsibility increasing; can manage multiple chores and homework
  • Independence high; less need for parental involvement in daily tasks
  • Testing boundaries minimal; understands consequences
  • Impulse control improving (though still impulsive compared to teens)
  • Tattling decreasing; more sophisticated conflict resolution
  • Competitiveness high; winning/losing important

Common Issues:

  • Perfectionism: Excessive worry about grades, appearance, performance
  • Friendship drama: Social conflicts, exclusion, gossip, cliques
  • Academic pressure: Self-imposed or parent-imposed; perfectionism about grades
  • Screen time: Video games, YouTube, beginning to hear about social media
  • Sports or activity overcommitment: Schedule overloaded
  • Emerging anxiety: Generalized anxiety, social anxiety, performance anxiety
  • Comparing self to peers: Worry about appearance, abilities, possessions

Ages 8–9: Approaching Preteen / Late Elementary Mastery

Physical Development:

  • Permanent teeth mostly erupted
  • Noticeable growth spurts
  • Increased coordination and strength
  • Some early puberty signs possible (especially girls: breast development, pubic hair)
  • Able to sit for 45+ minutes with brief breaks
  • Interest in sports and physical competence common

Academic Skills:

  • Reading solidly independent; reading for learning and pleasure
  • Writing expanding to multi-paragraph pieces
  • Math skills advancing; multiplication facts automatic for many
  • Homework 30–45 minutes typical; increasing responsibility
  • Studying and organizational skills developing
  • Critical thinking and analysis skills emerging
  • Ability to work toward goals and manage projects

Language & Thinking:

  • Vocabulary sophisticated; using complex sentence structures
  • Understanding cause and effect across domains (historical, scientific)
  • Beginning to understand nuance (sarcasm, irony, double meanings)
  • Perspective-taking sophisticated; understanding others’ complex motivations
  • Abstract thinking emerging (understanding fairness beyond rules, thinking about values)
  • Beginning to question authority; not accepting “because I said so”
  • Planning and problem-solving improving

Social & Emotional:

  • Friend groups established; importance of peer group high
  • Friendship conflicts complex; social manipulation possible
  • Popularity and social status very important
  • Beginning to be influenced by peer pressure
  • Interest in opposite gender beginning (or intense, depending on development)
  • Emotional expression more controlled (especially boys; different gender socialization)
  • Understanding moral complexity (right/wrong not always clear)
  • Anxiety and stress common; may be masked or expressed as physical symptoms
  • Identity beginning to form around interests, abilities, appearance

Behavior:

  • Generally cooperative; less need for oversight
  • Responsibility solidifying; can manage multiple responsibilities
  • Independence high; parental guidance needed rather than direction
  • Impulse control improving; consequences understood
  • Self-correction and problem-solving becoming possible
  • Defiance rare; when present, usually about autonomy (“That’s not fair!”)
  • Competitiveness high; sportsmanship developing but not always consistent

Common Issues:

  • Anxiety: Social anxiety, academic anxiety, generalized anxiety, separation anxiety possible
  • Perfectionism: Performance anxiety, fear of failure, excessive self-criticism
  • Friendship issues: Social drama, exclusion, bullying (as target or perpetrator), cliques
  • Academic struggles: Possible learning disabilities emerging; difficulty with academic demands
  • Screen time and gaming: Interest in video games, apps, YouTube intensifying
  • Body image: Early awareness of appearance; some diet culture exposure
  • Behavior changes: Moodiness, increased privacy-seeking (early preteen behavior)

What’s Causing These Changes: The Biology Behind School-Age Development

Academic learning capacity:

  • Prefrontal cortex maturation allows longer attention span, impulse control, planning
  • Synaptic pruning in language and academic centers increases efficiency
  • Myelination of reading and math centers supports fluency
  • Working memory expansion allows holding multiple pieces of information simultaneously
  • Speed of processing increases; automatic fluency develops (reading, math facts)

Social and emotional sophistication:

  • Theory of mind fully developed; understanding complex social dynamics
  • Mirror neurons active; empathy and perspective-taking strong
  • Amygdala and prefrontal cortex developing more integrated connection; emotional regulation improving
  • Peer orientation intensifies; neural reward system highly responsive to peer interactions
  • Anxiety systems active; threat detection systems more sophisticated

Identity and self-awareness:

  • Self-awareness deepening; understanding own abilities, strengths, weaknesses
  • Social comparison becomes automatic; peer comparison intensifies
  • Identity formation beginning; viewing self in relation to groups and interests
  • Perfectionism emerging as neural systems for self-evaluation mature

Physical changes:

  • Growth hormone increases; noticeable growth acceleration (especially around age 8–9)
  • Early puberty signs possible in older end of range (especially girls)
  • Motor skill refinement reflects continued cerebellar and cortical development
  • Sleep needs remain high (8–10 hours) but often disrupted by increasing cognitive activity and anxiety

What Parents Can Do: Strategies for Common Challenges

Ages 6–6.5: School Transition Support

Easing School Anxiety:

  • Visit school multiple times before starting; walk routes, meet teacher
  • Keep bedtime consistent and early (overtired children are more anxious)
  • Talk positively about school; share your own positive school memories
  • Acknowledge nervousness; validate feelings without dwelling
  • Keep goodbye brief; consistency teaches child you’ll return
  • Maintain after-school routine; predictable pickup and reconnection time
  • Recognize adjustment takes 4–6 weeks minimum

Supporting Academic Transition:

  • Don’t pressure academics; first grade is about adjustment and foundational skills
  • Read aloud daily; this is THE most important thing you can do for literacy
  • Play games with letters and numbers (not flashcards; play-based)
  • Keep homework brief and low-pressure; first grade homework is about practice and learning homework routine
  • Celebrate effort and persistence, not just correct answers
  • Expect wide variation in academic progress; “on grade level” is wide range

Managing Homework:

  • Establish consistent homework time and place (after snack/play, not right after school)
  • Keep first grade homework very brief (15 minutes max)
  • Your role: read instructions, provide support; child’s role: do the work
  • Don’t complete homework for child; your role is guide, not editor
  • If child is struggling, suggest teacher; don’t tutor without guidance

Ages 6.5–7.5: Building Responsibility and Managing Homework

Homework Management:

  • Typical homework 10–20 minutes daily; if more, discuss with teacher
  • Establish routine; same time, same place, few distractions
  • Child responsible for completing; parent’s role is to enforce system, not nag
  • If child consistently not completing: problem-solving conversation (“What’s hard about homework?”)
  • Grades are feedback; not indication of your parenting or child’s worth
  • If child struggling academically: request teacher conference before outside tutoring

Building Responsibility:

  • Age-appropriate chores: setting table, feeding pet, putting dirty clothes in hamper
  • Natural consequences work best: forget lunch, learn to pack lunch (with support)
  • Allowance separate from chores (chores are family responsibility; allowance teaches money)
  • Child managing backpack, homework folder, lunch box; parent reminds if needed but child responsible
  • Let natural consequences teach when safe to do so

Managing Extracurriculars:

  • One activity per season is typical; assess schedule for overtaxing
  • Child’s interest matters more than parent’s; consider child’s preferences
  • Screen time and free play are “activities” too; don’t overschedule
  • Assess fit: child enjoying? Learning? Not overwhe lmed?

Managing Anxiety:

  • School anxiety common in first/second grade; validate and support
  • Return-to-school jitters resolve with consistency
  • Separation anxiety may reappear; brief, consistent goodbyes help
  • If anxiety persists beyond 4–6 weeks, mention at pediatrician visit
  • Sleep and physical activity help manage anxiety

Ages 7.5–8.5: Peak School Years / Managing Expectations and Perfectionism

Managing Academic Pressure:

  • Grades are feedback, not reflection of worth or future success
  • Avoid communicating anxiety about grades to child
  • Success is not only academic; character, kindness, effort matter
  • Every child has learning differences; struggles with reading, math, or writing are common
  • If child consistently struggling, request evaluation; learning differences treatable with early intervention
  • Perfectionism emerging; validate feelings and model self-compassion

Supporting Friendships:

  • Friendships are critical; support development
  • Coach social skills: “You could ask ‘Can I play?'” or “That might have hurt their feelings”
  • Friendship conflict is normal; help problem-solve without fixing
  • If bullying suspected (repeated harmful behavior, not single conflicts): talk to school
  • If child socially withdrawn: consider whether temperament or anxiety; discuss with pediatrician

Screen Time Management:

  • Video games becoming more appealing; set clear limits
  • AAP recommends 1–2 hours high-quality programming daily (not exceeding this important)
  • Gaming in moderation okay; monitor content and total time
  • YouTube and apps emerging; consider parental controls
  • Family media plan: agreed-upon screen time, device-free meals, device-free bedtimes
  • Model healthy screen habits yourself

Homework and Academic Support:

  • Homework 20–30 minutes typical; if significantly more, discuss with teacher
  • Child increasingly responsible; parent’s role shifts to oversight
  • Test preparation: review at home if child anxious, but don’t pressure
  • If child struggling with reading or math: request evaluation rather than tutoring
  • Tutoring should supplement school support, not replace evaluation

Balancing Extracurriculars:

  • Reassess schedule; overcommitment contributes to anxiety
  • Child’s interest and enjoyment should drive choices
  • One activity per season reasonable; assess if more is truly wanted
  • Free play and downtime are essential; don’t overschedule
  • Sports, music, clubs are valuable; not necessary for future success

Ages 8–9: Approaching Preteen / Building Independence and Values

Supporting Homework Responsibility:

  • Child increasingly responsible for homework completion and organization
  • Homework 30–45 minutes typical for third grade
  • Your role: check in on completion, not constantly monitor
  • If child struggling academically, discuss with teacher about support/evaluation
  • Studying for tests: help child develop strategies; don’t memorize for them

Managing Perfectionism and Anxiety:

  • Normalize mistakes; model learning from errors
  • Avoid praising only achievements; praise effort and growth
  • Avoid communicating your own performance anxiety
  • If anxiety interfering with functioning (refusing activities, excessive worry), mention at pediatrician visit
  • Therapy can help anxious children; discuss with pediatrician

Supporting Friendship and Social Development:

  • Friend groups important; foster peer relationships
  • Social drama normal; validate and support problem-solving
  • Bullying concerns: address immediately with school
  • Conversations about kindness, inclusion, treating others well matter
  • Recognize child’s social life increasingly independent from parents

Managing Screen Time and Gaming:

  • Video game interest high; set clear limits before time-consuming games emerge
  • Screen time 1–2 hours quality content; monitor content for age-appropriateness
  • Gaming can be social; consider local versus online play
  • YouTube and social media emerging; proactive conversations about consumption
  • Model healthy screen habits

Identity and Self-Concept Building:

  • Child developing sense of self around abilities, interests, appearance
  • Positive identity formation: support interests, provide opportunities for success
  • Avoid comparing to siblings or peers
  • Support areas of struggle; build on strengths
  • Conversations about appearance, body, identity begin (especially important for girls; boys often follow)

Building Values and Independence:

  • Child understanding fairness, justice, consequences
  • Conversations about money, values, making choices become possible
  • Allowance teaching money management
  • Child making some decisions (activity choices, clothing within limits, friend decisions)
  • Balancing independence with guidance

When to Contact Your Healthcare Provider: Red Flags and Concerns

Contact immediately for:

  • Severe injury (head injury with loss of consciousness, significant bleeding, difficulty breathing)
  • High fever (over 103°F / 39.4°C) with altered mental status
  • Difficulty breathing or severe asthma attack
  • Severe allergic reaction (swelling, anaphylaxis)
  • Poisoning or medication ingestion
  • Suspected broken bone (severe pain, deformity, inability to use)
  • Uncontrollable bleeding
  • Severe abdominal pain
  • Chest pain or palpitations
  • Suicidal statements or self-harm (requires immediate evaluation)
  • Thoughts of harming others
  • Sudden behavioral change (extreme aggression, dramatic personality shift, acting like different person)

Contact within 24 hours for:

  • Fever over 101°F (38.3°C) lasting 3+ days without improving
  • Persistent vomiting (unable to keep fluids down)
  • Diarrhea lasting 2+ days
  • Rash that doesn’t fade with pressure or spreads
  • Ear pain or behavior suggesting ear infection
  • Persistent cough lasting 2+ weeks or interfering with sleep
  • Unusual lethargy or behavior (acting unlike themselves)
  • Severe headache (different from typical complaints)
  • Difficulty swallowing or severe sore throat

Schedule routine visit to discuss developmental/behavioral concerns:

  • Significant academic struggles (consistent difficulty with reading, writing, math despite support; request evaluation for learning disability)
  • Anxiety interfering with functioning (refusing school, excessive worry, panic symptoms, perfectionism interfering with activities)
  • Social difficulties (not making friends, withdrawn, bullying concerns, peer rejection)
  • Behavioral changes (sudden increase in defiance, aggression, lying beyond normal)
  • Attention or impulse control concerns (difficulty focusing, impulsive behavior, hyperactivity significantly exceeding peers)
  • Mood changes (persistent sadness, irritability, loss of interest in activities)
  • Sleep problems (significant sleep onset difficulty, frequent night waking, nightmares)
  • Physical complaints without clear cause (frequent stomachaches, headaches, pains; may indicate anxiety)

Common Myths and Misconceptions About School-Age Development

Myth: If your child struggles with reading/math, they’ll always struggle. Reality: Early intervention for learning differences (dyslexia, dyscalculia, etc.) is highly effective. Many children who struggle early catch up with appropriate support. Learning differences don’t equal low intelligence.

Myth: Homework is essential for learning and future success. Reality: Research shows homework in early elementary has minimal impact on academic achievement. Homework’s purpose is practicing newly learned skills and establishing routine. Excessive homework or homework battles harm more than help.

Myth: Grades in elementary school predict future success. Reality: Elementary grades reflect engagement, effort, and behavior more than ability. Many high-achieving students had mediocre elementary grades; many low grades became high achievers. Early grades are poor predictors of long-term outcomes.

Myth: Pushing academics early gives children advantage. Reality: Early academic pressure often backfires: reducing intrinsic motivation, increasing anxiety, and creating negative associations with learning. Play-based learning in early elementary is more effective than formal academics.

Myth: If child isn’t reading by first grade, they’re behind. Reality: Reading development is wide spectrum. Some children read at 4; others at 7. Age 4–7 is completely normal range for reading onset. Late readers catch up by third grade in most cases.

Myth: Perfectionism in children means they’re motivated and will succeed. Reality: Perfectionism often reflects anxiety, fear of failure, or excessive parental pressure. Perfectionistic children struggle with self-esteem, may avoid challenges, and experience high anxiety. Healthy achievement motivation ≠ perfectionism.

Myth: Popularity in elementary school predicts social success later. Reality: Social hierarchies change dramatically. Popular children in elementary may become withdrawn in middle school; shy children may bloom. Childhood popularity doesn’t predict adult social skills.

Myth: Extracurriculars are necessary for future success. Reality: Free play, downtime, and family time are equally or more important. Overcommitment causes stress and eliminates unstructured play, which is critical for creativity and development. Quality > quantity.

Myth: Video games rot your brain/harm development. Reality: Some video games have cognitive benefits (strategy, problem-solving, spatial reasoning). Excessive gaming or inappropriate content is concerning. Moderation and age-appropriate content matter.

FAQ

What is typical development for a 6- to 9-year-old?

Children in this age range grow steadily, develop logical thinking, improve reading and math skills, form deeper friendships, and seek more independence. Milestones vary widely, but most show progress in physical coordination, language, and social-emotional skills. If you have concerns, discuss them with your pediatrician.

When should my child be able to read independently?

Many children begin reading simple books around age 6–7, but some take longer. By age 9, most can read chapter books fluently. Reading readiness depends on exposure, instruction, and individual development. If your child struggles significantly or avoids reading, talk to their teacher and consider an evaluation.

How can I help my child make friends?

Arrange playdates, encourage participation in group activities, and model social skills like sharing and listening. Teach your child to introduce themselves, join games, and resolve conflicts calmly. If they have persistent difficulty, a school counselor or pediatrician can offer guidance.

When should I be concerned about my child’s behavior?

Seek help if your child shows extreme and persistent sadness, anxiety, aggression, or withdrawal that interferes with daily life. Also watch for sudden changes, loss of skills, talk of self-harm, or ongoing trouble with peers. Your pediatrician can help determine if further evaluation is needed.

References

  1. American Academy of Pediatrics. Caring for Your School-Age Child: Ages 5 to 12. 3rd ed. Bantam; 2018.
  2. Centers for Disease Control and Prevention. Middle Childhood (6-8 years). CDC’s Developmental Milestones. https://www.cdc.gov/ncbddd/childdevelopment/positiveparenting/middle.html. Reviewed 2021.
  3. Centers for Disease Control and Prevention. Middle Childhood (9-11 years). CDC’s Developmental Milestones. https://www.cdc.gov/ncbddd/childdevelopment/positiveparenting/middle2.html. Reviewed 2021.
  4. World Health Organization. Guidelines on Physical Activity, Sedentary Behaviour and Sleep for Children Under 5 Years of Age. 2019. (Note: While focused on under 5, principles of sleep and activity extend; for school-age, AAP and CDC provide specific recommendations.)
  5. National Institute of Child Health and Human Development. What Are the Milestones of Child Development? https://www.nichd.nih.gov/health/topics/child-development/conditioninfo/milestones. Reviewed 2020.

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