The main objective of this article is to analyse the four basic dimensions of the learning organization (LO) -- leadership towards learning, learning structure, learning opportunities and learning culture -- within the school organization context. A quantitative study utilizing a survey was carried out. By means of an ad hoc questionnaire, secondary and high school teachers were asked about some characteristics of their educational organizations that could be related to a LO. The analyses of the internal structure of the questionnaire and internal consistency of the scores were satisfactory. A questionnaire has been validated that can serve as a model for the evaluation of learning organizations in the context of high school. One school sample is analysed according to the LO model. The suitability of the model for different types of schools is verified.