This article is a pilot study on the relationship between performance in online classes and behavior in online discussion forums. Measuring student activity on the discussion forum, the collected data is then analyzed and mapped to the performance of the students on the course. The student activity was dividedinto a number of parameters, and during the study these parameters were compared to the performance of the students.The significance of each parameter was also analyzed through a Kruskall-Wallis-test Overall there was a strong tendency thatstudents with more activity and engagement received higher grades. This is in the future useful for developing some kind of monitoring to identify and support students on the verge of failing the course.