As part of my Montessori adolescent teaching program, I have to take notes in class on various parts of the Montessori philosophy – via her essays, lectures or of lectures given my Montessori teachers. I am sharing my notes for others who might benefit from them.

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These sensitive periods are of great importance and education must facilitate this opportunity which is inherent in the child. Education must prepare an environment that will aid the development of life.

Maria Montessori, The 1946 Lectures, p. 18

• Fundamental Concepts of Sensitive Periods
  • Defined as crucial stages in child development (0-6 years) when children are particularly receptive to acquiring specific skills or knowledge
  • Work in conjunction with human tendencies and mathematical mind to construct an integrated personality
  • Each period has a specific duration and varies among individuals
  • Multiple sensitive periods can overlap and manifest with varying intensities
  • Once a period ends, the heightened sensitivity disappears, but the acquired skills remain

• Historical Origins and Research
  • Developed by Maria Montessori through extensive observations and research
  • Inspired by Hugo de Vries’ research on sensitive periods in physiological growth
  • Based on observations of phenomena like butterfly larvae being drawn to light for nourishment
  • Modern researchers continue to study effects on neurobehavioral function

• Key Characteristics
  • Each period leads to the formation of specific psychic organs
  • Creates intense interest in particular aspects of the environment
  • Enables effortless learning during the sensitive window
  • Leaves permanent traces in individual development
  • Requires appropriate environmental support

• Major Sensitive Periods
  • Language (Birth to 6 years)
    • Begins with observation of mouth movements
    • Progresses through babbling stage (8-10 months)
    • Encompasses all aspects of cultural language
    • Includes potential for multiple language acquisition
    • Involves both social and physical development
    • Requires precise and accurate language from adults
  • Movement (Birth to 4 years)
    • Starts with reflexes in infants
    • Progresses from head to toe control
    • Requires freedom to move and explore
    • Refinement stage (3-6 years) includes:
      • Development of equilibrium
      • Mindful movement
      • Daily life skills
      • Fine-motor coordination
  • Sensorial Exploration
    • Acquisition phase (Birth to 3 years)
      • Active gathering of sensory impressions
      • Holistic absorption of environmental information
    • Refinement phase (3-6 years)
      • Classification of sensory experiences
      • Development of deeper understanding
      • Use of sensorial materials for organization
  • Order (Birth to 4-5 years)
    • Helps children categorize and recognize patterns
    • Merges mental and physical development
    • Includes fascination with small objects (peak at 18 months and 3 years)
    • Requires consistent schedules and clear boundaries
    • Connected to emotional well-being
  • Social Relations
    • Begins with family focus
    • Expands to community involvement
    • Includes weaning period for social integration
    • Develops grace and courtesy (3-6 years)
    • Requires adult modeling of appropriate behavior

• Consequences of Missed Sensitive Periods
  • Skills can still be learned but with greater difficulty
  • Compared to a “dropped stitch” in knitting
  • May result in incomplete development in specific areas
  • Requires more time and effort to develop skills later
  • Example: Adult language learning versus childhood language acquisition

• Integration of Personality
  • Physical organs develop independently first
  • Integration occurs around age 2.5 years
  • Sensitive periods guide unconscious absorbent mind
  • Contributes to development of intelligence, abstraction, and imagination
  • Results in formation of unique individual personality

Quotes

Each of these powers has its own special interest, and this form of sensitivity is so lively that it leads its possessor to perform a certain series of actions. None of these sensitivities occupies the whole period of development. Each of them lasts long enough for the construction of a psychic organ. Once that organ is formed the sensitivity disappears. But, while it lasts, there is an outpouring of energy incredible to us who have outgrown it so completely we can no longer remember ever having had it. When all the organs are ready, they unite to form what we regard as the psychic unity of the individual.

• Maria Montessori, The Absorbent Mind, p. 51.