This paper reports on teacher practices in tablet-based Finnish one-to-one computing classrooms in grades 7-9. The aim of this study was to increase the understanding of teacher practices by illustrating and analysing the relations of power and control in Finnish teachers' one-to-one computing classrooms. The study applied methods based on classroom observations, photographs and audio recordings of the teachers' communication. Within the context of this study, the results indicate two theoretically distinct, but varying, forms of teaching practice. These teaching practices demonstrate contrasts with regard to how the classroom spaces were organised, including one-to-one computing, as well as the teacher-enacted communication with students. Based on how power and control either was retained by the teachers or distributed to the students, this paper highlight how different meanings were constructed in student learning.