Grounding Mathematics Education. - Sign Processes. - Agency and Creativity in the Semiotics of Learning Mathematics. - The Semiotic Approach to Mathematical Evidence and Generalization. - Signs as Means for Discoveries. - Diagrammatic Thinking. - Notes on a Semiotically Inspired Theory of Teaching and Learning. - Mathematics Sign and Activity. - Sign Processes in the Mathematics Classroom. - Semiotic Mediation in the Primary School. - Do Mathematical Symbols Serve to Describe or Construct Reality?. - Metaphor and Metonymy in Processes of Semiosis in Mathematics Education. - On Practical and Theoretical Thinking and Other False Dichotomies in Mathematics Education. - The Semiotics of the Schema. - Mathematics Education as a Science. - Towards a Normal Science of Mathematics Education?. - The Study of the Didactical Conditions of School Learning in Mathematics. - The Formal The Social and the Subjective. - Crossing Boundaries. - Reflective Learning. - Thinking and Knowing About Knowledge. - The Cognitive Unconscious. - History of Mathematics and Mathematics Education. - Hilbert Weyl and the Philosophy of Mathematics. - Mathematical Metaphors in Natorp's Neo-Kantian Epistemology and Philosophy of Science. - Newton's Program of Mathematizing Nature. - Did Hermann and Robert Graßmann Contribute to the Emergence of Formal Axiomatics?. - A Case Study in Generalisation. - Some German Contributions to Mathematics Research in Brazil. - Making Philosophy of Mathematics Relevant. - Data Structures and Virtual Worlds. - Variables in Particular Random Variables. - Deduction Perception and Modeling. - Models of Data Theoretical Models and Ontology. - Some Sober Conceptions of Mathematical Truth. - Can There Be an Alternative Mathematics Really?. - Coda. - An Interview with Michael Otte. Language: English