An objective of physical education (PE) is supporting students’ positive motor development. Therefore, it is indispensable for them to be in command of the necessary basic motor competencies (in German: Motorische Basiskompetenzen; MOBAK) as the prerequisites to be able to participate in the culture of human movement. For the implementation of the MOBAK approach in Luxembourg (MOBAK-LUX), we developed the test instruments MOBAK-LUX-PS for preschoolers, MOBAK-LUX-1 for first graders, MOBAK-LUX-3 for third graders and MOBAK-LUX-5 for fifth graders. These motor tests are conducted on a voluntary basis by interested schools and teachers at the beginning of each school year. In general, about one third of students in the different class levels have support needs in at least one area of basic motor competence. The support needs are prevalent mostly in the area object control and girls generally have lower results than boys, especially in object control.