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Pediatrics · Chapter 1. General Issues

School age

School age covers the period of a child's life from 7 to 15 years. This is a crucial stage of ontogenesis during which vital parameters practically match those of an adult, tissue differentiation is completed, and all organs and systems finally mature.

PeriodFrom 7 to 15 years
PubertyEndocrine remodeling and puberty begin at 9–11 years of age
PsychologyThe second signaling system and abstract thinking are actively developing
OcclusionThe transition from temporary (deciduous) teeth to permanent teeth is completed
3 min readFor medical studentsUpdated Sep 20, 2026
Material prepared by WhiteCoat Pro editorial team based on platform study guidesReviewed by medical editor: Aulov A. A., general practitioner · 09/24/2026

Anatomical, physiological, and endocrine maturation

During school age, the child's organism enters the home stretch of its biological development. This stage is characterized by the fact that the main vital parameters reach values typical of an adult organism.

Key physiological processes of this period:

  • Tissue differentiation: The process of cell and tissue specialization is fully completed.
  • Functional maturation: Organs and systems switch to an "adult" mode of operation, reaching their ultimate functional maturity.
  • Change of bite: Temporary deciduous teeth are completely replaced by permanent ones.
  • Hormonal remodeling: The age of 9–11 is a critical point when entering puberty begins. The mechanisms of sexual maturation are triggered, accompanied by massive endocrine changes.

Neuropsychiatric development

Parallel to physical growth, there is a powerful leap in the development of higher nervous activity and psychological maturation.

Functional changes in the nervous system include the refinement of the second signaling system. Due to this, the child develops the capacity for conceptual, abstract thinking—learning to operate with complex categories without relying exclusively on visual imagery.

Psychological maturation is marked by a transition to a completely new level of social responsibility. The schoolchild acquires the ability to:

  • Make independent decisions.
  • Understand the consequences of their actions.
  • Take responsibility for their own deeds before society.
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Impact of stress and typical pathologies

The beginning and continuation of education are associated with a sharp increase in physical and psycho-emotional loads. The so-called "school stress" often becomes a trigger for the manifestation of latent diseases or delayed pathologies.

All arising disorders can be divided into three main groups:

  1. Neurological and psychosomatic disorders:
  2. Delayed manifestations of previously hidden cerebral disorders.
  3. Development of neuroses.
  4. Autonomic dysfunction syndrome (widely known as vegetative-vascular dystonia).
  1. Somatic diseases:
  2. The gastrointestinal tract suffers first, most commonly manifesting as gastritis.
  1. School-related pathologies:
  2. Musculoskeletal disorders: prolonged sitting at a desk provokes posture defects.
  3. Visual organ pathologies: high visual load leads to decreased visual acuity and the development of myopia (nearsightedness).

Issues of school maladaptation

Serious difficulties in the learning process often arise not due to a decrease in intelligence, but as a result of school maladaptation syndrome. The main cause of this condition is two factors:

  • Lack of basic preparation: weak initial reading and writing skills at the time of admission to an educational institution.
  • Executive dysfunction: lack of organizational skills, inability to plan one's time, concentrate attention, and follow educational algorithms.

Together, these factors prevent the child from integrating into the educational process, exacerbating psycho-emotional tension.

Class and exam questions

At what age does entry into the pubertal period begin?

Entering the period of puberty (endocrine remodeling) begins at the age of 9–11 years.

What is the main cause of school maladaptation?

The main cause is a lack of basic preparation for school (weak reading and writing skills) combined with underdeveloped organizational skills (executive dysfunction).

Which "school-related" pathologies occur most frequently?

Typical school-related diseases include musculoskeletal disorders (posture defects) and visual pathologies (myopia, decreased visual acuity).

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What else to study on this topic

  • Stages of puberty and endocrine remodeling
  • Mechanisms of abstract thinking formation in adolescents
  • Prevention of autonomic dysfunction syndrome in schoolchildren
  • Methods for correcting executive dysfunction
  • Prevention of myopia and posture defects in the educational process

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  • Full study guide on "School age" and 3,738 more pages of the subject
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