EN
The present paper aims to examine the patterns of motivational variability in a group of 11 EFL senior high school students. It consists of two, theoretical and empirical, parts, the first of which will concentrate on motivation as seen through the lens of D. Larsen-Freeman’s Complex Dynamic Systems Theory and on an overview of research into motivation conducted in light of the said theory. As regards the second part of the paper, it is meant to discuss the results obtained from a six-month-long quantitative study of changes in the subjects’ levels of motivation during the EFL lessons. Data gathering tools included a general questionnaire referring to motivation, motivational grids and evaluation sheets.