The study examined the effect of a short-term training programme οn in-service physical education teachers’ behaviour and students’ engagement in learning. The participants were 32 teachers, who were randomly divided into an experimental and a control group. The experimental group attended a two-hour lecture followed by a two-hour practicum, and showed significant improvement and learning of all the examined behaviours as well as significantly higher performance than the control group. Also, students of the experimental teacher group presented significantly greater activity time, more practice attempts and more successful ones than their peers in the control group.