The article presents the results of research conducted in order to determine the comprehensibility (intelligibility) of the text of signs on educational paths in Warsaw’s city forests. This evaluation was carried out with the use of an online IT tool—Promovolt. The obtained results were confronted with the assessment of users of educational paths and the opinion of an expert group, which consisted of people involved in the design of educational materials. The results indicate that the majority of the analyzed interpretative signs are dedicated to secondary school students because of the level of text comprehensibility. At the same time, 20% of the text is understandable only to recipients with higher education. This means that the educational paths in the urban forests of Warsaw, with interpretative signs allowing independent learning, do not sufficiently support the ecological education of children and youth from primary schools up to 15 years of age, as well as people with basic or vocational education.