Abstract
An investigation into Estonia's educators' representations of organisational culture, based on the typologies of R. Harrison and C. Handy, and into the educators' cognitive orientation on the basis of J. Rotter's internality/externality scale was carried out. The aim was to determine, whether the organisational culture in Estonia's schools supports the sustainable development of teachers. The study revealed that amongst Estonia's teachers the individuality-oriented individualistic culture dominated, and that almost half of the teachers had an external locus of control. The conclusion was drawn that the culture of learning organisation was not characteristic of Estonia's schools, while that type of culture would best support the professional and sustainable development of teachers.