Abstract
This article presents part of a doctoral research project aimed at investigating the effects and possible limits of the discovery learning approach in teaching grammar to English as a foreign language (EFL) students in high schools in Slovakia from the teachers’ perceptions. The research project deployed design-based research with a total of 7 EFL teachers in Slovak high schools collecting data in three phases. The data presented in this article focused on intervention and were collected during the second phase of the research project. During the intervention, the teachers were taking field notes which were subsequently analysed. The results of the analysis of the teachers’ field notes showed there are mostly positive aspects of the discovery learning approach, pointing out students’ experience with discovery and their engagement when learning grammar. However, the results also showed some limits of this approach in the high school environment. Mostly training is needed for both teachers and students so they can make the most of the discovery process.