1. information about a phenomenon, e.g. a being, an object, that helps to distinguish it, to identify it among other similar phenomena 2. information that describes a phenomenon, e.g. a being, a process, a state, by providing descriptive details about the phenomenon. Data can be expressed numerically, i.e. quantitatively, and textually, i.e. descriptively. In education, data are used to describe, for example, the types, number and geographical distribution of educational institutions, the educational level of teachers, pupil/student performance, education funding, etc. The analysis of education data allows the quality of education to be assessed and conclusions to be drawn, good practices and gaps to be identified. Educators, education managers and education policy-makers can use data to make decisions on the organisation of education, methods and optimal use of resources, to plan future actions, and to develop problem-solving concepts. 3. information obtained through data collection methods appropriate to the methodology of the discipline, such as surveys, interviews, document analysis