Principles of child development and growth

Growth means measurable physical increase in size, weight, height, body proportion and organ capacity. It is quantitative: a child's weight can be recorded in kilograms, height in centimetres and head circumference in centimetres. Growth is rapid in infancy, slows in middle childhood and again accelerates during puberty. In field work, growth is usually tracked through weight-for-age, height-for-age, weight-for-height, body mass index for age and visible signs of malnutrition. For an Anganwadi worker or Mahila Supervisor, a missed growth milestone is not just a number; it signals the need for counselling, home visit, referral or closer nutrition follow-up.

Development is wider than growth. It includes progressive change in physical control, language, thinking, emotions, social behaviour, moral judgement and self-help skills. It is qualitative as well as quantitative: a child learns to sit, walk, speak, share, pretend, compare, classify and solve problems. Development depends on maturation, learning, health, stimulation and social relationships. A child may grow in height but still show delayed speech or poor social interaction; therefore growth and development must be observed together.

Exam focus: growth is mainly physical and measurable, while development is broader, progressive and covers many domains.