Being videotaped could have affected the typicality and quality of the lessons. Teachers were asked specifically about the influence of the camera in the classroom, both in terms of the influence on their teaching and on students' behavior. When teachers were asked whether the camera caused them to teach a lesson that was worse than usual, same as usual, or better than usual, the majority of lessons were taught by teachers who rated their lesson as about the same as usual, except in the case of the Czech Republic. An equal percentage of lessons in the Czech Republic were taught by teachers who rated their lesson as about the same or worse than usual. In terms of students' behavior during the videotaped lessons, a majority of lessons were taught by teachers who reported their students' behavior as being about the same or better than usual.