How can I measure with my body? Where do the clock hands point when school starts? How many minutes until my school bus arrives? Clarifying students' questions while simultaneously imparting knowledge - that is student-oriented mathematics instruction! Examples from daily life have been chosen for the concepts of time and length, through which children can work in a hands-on manner. For both topics, fundamental prerequisites are first established; for example, they measure the duration of a piece of music using both a dripping water container and a stopwatch. They measure distances using foot and stride lengths and then determine the exact lengths with different measuring tools. Building on this, calculations are made with the measurements. Clear solution pages allow for independent verification of results. Also suitable for the primary level of special education.