Human development mostly characterized by development milestone. New behaviours are getting complex as the step of development grow, which able to be predicted. For example, children usualy learn or try to walk after able to stand their body and crawl. Children start to think logicaly about idea which skill in abstract after they able to think logicaly about concret subject and observed events. They start to feel worry about what people think about them, and reality people are thinking about them. On specific limitation, we can see the universals of sequence of human development. Percise pattern how children changing by the time. In spite of different environment where children grow and develop.
Children grow in different speed
Many descriptive researcher informed about the average age to reach the peak of development or milestone.
For example, generally children able to draw square and triangle on age of 3 years old, start to use repitation as a media to learn information on age 7 or 8 years old, and begin to have their puberty period on age of 10 years old (for female children) or age of 11 years old (male children).
(McDevin & Omnod, 2007).
However, not all children reached milestone on the same age. Some of them reach earlier, and the rest reach their milestone later than others. Therefore, milestone always found in various age.
Determination of approxiate age of children when they behave and think may possible people to make approxiate age generally about children ability on specific age. More ever, by using this approximation, people able to make or design education curriculum and strategy in education to be used further. On the same time, people able to avoid to make conclution about what children able or disable based on their age only.
