**Abstract**

Measurement of students' well-being has become a significant issue as the paradigm of education outcomes has switched from just academic achievement to a holistic personal development. Nowadays different approaches to assess and to describe well-being in different age groups and contexts exist. All of them have some strengths and limitations that will be discussed in the following chapter. There are some major challenges that researchers and practitioners are facing: the amount of information that could be provided by existing instruments, the possibility to compare results in wellbeing dynamics, and the ways of presenting results to the participants and institutions for practice improvement. Addressing these approaches and challenges, we are going to discuss international research and practices as well as our own experience of well-being large-scale assessment. Some decisions for research and practice will be provided.

**Keywords:** measurement, well-being, feedback, students
