Modern attempts to explain why some assessment tools are readily adopted by school-based personnel whereas others are not have focused on the concept of usability. Usability encompasses not only the degree to which consumers find an assessment tool to be acceptable, but also the degree to which it is well-understood, believed to be feasible,…

The mission of German special schools is to enhance the education of students with Special Educational Needs in the area of Learning (SEN-L). However, recent studies indicate that students with SEN-L from special schools show difficulties in basic arithmetical operations, and the development of basic mathematical skills during secondary special…