This article outlines in a theoretical and practical way the concepts of self-regulated learning, learning strategies and metacognition by looking at concrete examples in the classroom. The teachers presented in the article were taking part in a research and development (R&D) work project in which they were cooperating both with each other and a researcher who was facilitating their way through the development processes. The article focuses on how the teachers introduced learning strategies, how the strategies were adapted to the pupils, how the strategies were connected to various tasks and what the use of strategies means for the pupils' learning in the studied context. The overall aim of the article is to illuminate how the teachers experienced the pupils' use of strategies in their learning work. Findings from the study indicate that teachers have to adapt the introduction and use of strategies to the pupils' development levels and that pupils from 13 to 16 years of age need help from their teachers, both in learning and in controlling their own learning processes. (Contains 1 figure and 3 notes.)