This paper examines the learning success of the Virtual Reality course unit "So small! -- So big!" compared to conventional teaching. In the form of a field experiment and three random sample tests, the learning success of 67 subjects was examined. In the analysis of the collected data, the differences between the educational levels and the sexes were examined in addition to the overall comparison. In addition, the individual questions of the random sample tests were checked for anomalies. The analysis showed that the two learning units are to be regarded as equivalent. The subjects achieved short and medium-term learning success with both teaching methods. However, no differences could be found between the two teaching methods; they must be regarded as equivalent. The only exception is the difference between the educational levels in terms of medium-term learning success. [For the complete proceedings, see ED608557.]