In this article we present a structured set of Design Patterns (DPs) that deals with tracking students while they solve problem in specific domains such as programming or mathematics. Our collection of 17 DPs yields a three step approach: First step: to collect and analyze information on each student for each exercise; Second step: to build a higher level view of one student's activity on a set of exercises; Third step: to build an overview of the whole class activity. To evaluate our DP set we investigate whether our DPs account for experiences from the literature as a first step toward a pattern language for students' assessment. (Contains 4 figures and 6 notes.)