Abstract: The collaborative research project FUNDAMENT has the objective of increasing the individual learning success of civil engineering students by using digital university teaching. One part of the project is the development and evaluation of interactive online modules (IOM) in the introductory phase for the engineering mechanics lectures. The IOM consist of learning videos and online exercises. This article explores the effectiveness of these IOM using a classic longitudinal experimental and control group design. Paper and pencil knowledge tests were applied at the beginning (MP 1) and the end (MP 2) of the first semester. The use of the IOM was operationalized by recording the clicks on corresponding links. In a sample of n = 34 students an increase of the mean person ability (dichotomous Rasch model) from B(MP 1) = .05 to B(MP 2) = .73 could be determined.