The safe way to individual performance measurement and assessment! Teaching is becoming increasingly individualized. Students learn at different levels, and open teaching formats allow for differentiated practice and learning. Teachers face the challenge of designing performance assessments in the form of tests and classwork in a differentiated manner. They are uncertain about the specific options available to cover the performance spectrum of their class as broadly as possible and what legal requirements need to be considered. This volume provides answers to these questions. It offers insights into forms of differentiated performance measurement and assessment for all students. It illustrates how the heterogeneity of students influences lesson organization and what conclusions must be drawn from this. Legal requirements with guidance are included.