What is Attractive, Efficient and Has Appeal?

This article is about the peer tutorial in the course Basics of Fluid Mechanics in Biochemical and Chemical Engineering. The tutorial takes place in groups with two tutors each (dyad). Four different types of tutors were selected: a student of a higher semester with good performance, which serves as a comparison group as this type is usually chosen, a student attending the course for the first time in the standard period of study, a student who had already failed the exam several times, and each session alternating students from the tutees. The dyads were formed with one student of the conventional type. The comparison dimensions are effectivity, efficiency, and appeal. It was observed that each unconventional design has specific advantages, but no particular disadvantages compared to the comparison group. Especially for efficiency this is remarkable, since the better clarification and increased discussions in the tutorial lead to less open questions, which have to be clarified in the office hours with the teachers. This overcompensates for the additional instructional effort to the tutors. The best exam results were achieved by the group with the failed tutor. The current student as tutor led to a massively increased exam writing rate, which reduced procrastination of the tutees. The effect sizes are not particularly large, which may be due to the time period studied at the beginning of the Corona pandemic. As at least small advantages without disadvantages were identified, this work recommends the testing of such unconventional tutorial designs.