Monitoring students' work in the classroom has been recognized as one of the
key factors for successful teaching since only a good real-time assessment
enables the teacher to give proper and timely feedback. However, it is not an
easy task to systematically supervise what students do in the classroom. It
also might consume a considerable amount of teachers' resources. This paper
presents a work in which computer technology is used in classrooms by students
working on electronic worksheets on their. We explore the possibilities of
assessing students' work during classroom by automatically analyzing the
structure of the documents and the changes along time while students work on
them. An experiment is described, showing the system is able to give the
teacher valuable information. This information is intended to assess the
students' performance and provide them with proper feedback.