Teachers' perceptions of the usefulness of digital games might be a reason for the limited application of digital games in education. However, participants in most studies of teaching with digital games are teachers who do not use digital games regularly in their teaching. This study examined the practice-based perceptions of teachers who do teach with digital games - either playing or creating games - in their classroom. Semi-structured interviews were conducted with 43 secondary education teachers. Our ﬁndings showed that most teachers who actually use games in class perceived student engagement with a game and cognitive learning outcomes as effects of the use of games in formal teaching settings. Fewer teachers mentioned motivational effects of learning with digital games. The implications of these ﬁndings for the use of digital games in teachers’ educational practice are discussed.