Definitions

What is Science?

In common usage the word science is applied to a variety of disciplines or intellectual activities which have certain features in common. Usually a science is characterized by the possibility of making precise statements which are susceptible of some sort of check or proof. This often implies that the situations with which the special science is concerned can be made to recur in order to submit themselves to check, although this is by no means always the case. There are observational sciences such as astronomy or geology in which repetition of a situation at will is intrinsically impossible, and the possible precision is limited to precision of description.
A common method of classifying sciences is to refer to them as either exact sciences or descriptive sciences. Examples of the former are physics and, to a lesser degree, chemistry; and of the latter, taxonomical botany or zoology. The exact sciences are in general characterized by the possibility of exact measurement. One of the most important tasks of a descriptive science is to develop a method of description or classification that will permit precision of reference to the subject matter.

What is Technology?

Application of knowledge to the practical aims of human life or to changing and manipulating the human environment. Technology includes the use of materials, tools, techniques, and sources of power to make life easier or more pleasant and work more productive. Whereas science is concerned with how and why things happen, technology focuses on making things happen. Technology began to influence human endeavour as soon as people began using tools. It accelerated with the Industrial Revolution and the substitution of machines for animal and human labour. Accelerated technological development has also had costs, in terms of air and water pollution and other undesirable environmental effects.

What is Teaching?

Profession of those who give instruction, especially in an elementary or secondary school or a university. The teaching profession is a relatively new one. Traditionally, parents, elders, religious leaders, and sages were responsible for teaching children how to behave and think and what to believe. Germany introduced the first formal criteria for the education of teachers in the 18th century. In the 19th century, as society became more industrialized, the concept of schooling became more universal. In industrialized nations today, most teachers are university graduates. Teacher-training programs usually include both general and specialized academic, cultural, or vocational courses; the study of educational principles; and a series of professional courses combined with practical experience in a typical school setting. Most countries also require professional certification following formal training.