...' awareness and knowledge of transition problems between the institutions. The Danish case, among other things, illustrates that teachers from upper secondary school mainly contribute knowledge about students' needs and task designs related to the algebraic skills required in upper secondary school. Lower...

... to focus on the object of learning and to use research results found in mathematics education in order to open up dimensions of variation in the identified critical aspects. Social implications – The design of algebra modules, according to concepts from variation theory and the reflection process...