The advent of mobile learning offers opportunities for students to do two things at once in an educational context. Students can learn while performing another activity. Two experiments were set up to examine the effect of performing a secondary task while learning with a mobile device. In the experimental group, the participants had to combine a learning task (watching movies on an iPod while sitting at a desk) with a secondary task (screwing). The control group only had to perform the learning task. Additionally, participants of the experimental group received different instructions. Some were asked to do both tasks as good as possible, others were told that the learning was important and the screwing less important and the opposite was told to the participants of the third experimental group. Afterwards, all the participants had to complete a learning test and participants of the experimental group also received a screwing score. In general, the effect of condition on the learning task was rather limited. Only one significant effect was found and it was limited to a difference between students of the control group who outperformed the students focusing on the screwing task while learning. [PUBLICATION ABSTRACT] .