The idea presented in this paper is to use the logs of CSCL system to guide the teacher and the students using the system. The logic used in the system consists of applying finite qualitative evaluation rules to the logs. One of the characteristics of the system is to ask the user to define what their are doing into the system to say, for instance, if they are making a proposal, or a contra-porposal, or commenting, or clarifying, or questioning. Finally the logs are compared with a model of what a good interaction in the group should look like.