Abstract
In teaching a variety of difficulties arise when working with functions. Therefore, the question arises, what is the influence of technology-based material on the individual conceptions of students of lower secondary school. Are dynamic worksheets able to help students to develop appropriate conceptions? In this talk, specific dynamic GeoGebra applets which are intended to support the development of appropriate skills as well as the research design and results of a corresponding qualitative study of a PhD project are presented.