Evaluating a learning progression on ‘Transformation of Matter’ on the lower secondary level

One of the most central tenets of chemistry education is developing an understanding of the processes that involve the Transformation of Matter. Current German curricula postulate content-related abilities (Kompetenzen) that are expected to be achieved by secondary students when graduating from the lower secondary level at grade 10. These abilities can further be differentiated as relating to either structural aspects of matter...