In this article we explore how mathematics classrooms are constructed in the most commonly used teacher guides for elementary schools (Grades 1-6) in Finland. The teacher guides cover about 87 percent of the Finnish market and several reports show that Finnish teachers appreciate and follow the guides. The construction of classrooms is investigated in terms of cultural scripts through analysis of the form and function of the conveyed recurrent classroom activities – quantitatively. The analyses reveal relatively uniform cultural scripts with certain pattern regularly, emerging in all three textbook series. For instance that, the lessons gives all students opportunity to join whole class interaction where communication, variation with routines exists as well as homework are offered. These findings are discussed in the light of earlier cross-cultural research about effective mathematics teaching and in relation to methodological challenges of mapping cultural scripts.