1. Acceptance criteria for validating mathematical proofs used by school students, university students, and mathematicians in the context of teaching

   • Daniel Sommerhoff
   • Stefan Ufer

   Original Article 18 March 2019 Pages: 717 - 730

   

2. Fostering first-year pre-service teachers’ proof competencies

   • Leander Kempen
   • Rolf Biehler

   Original Article 11 February 2019 Pages: 731 - 746

   

3. Type of mathematical proof: personal preference or adaptive teaching behavior?

   • Esther Brunner
   • Kurt Reusser

   Original Article 01 February 2019 Pages: 747 - 758

   

4. Intuition and proof in the solution of conjecturing problems’

   • Maria Alessandra Mariotti
   • Bettina Pedemonte

   Original Article 18 May 2019 Pages: 759 - 777

   

5. Dragging, instrumented abduction and evidence, in processes of conjecture generation in a dynamic geometry environment

   • Anna Baccaglini-Frank

   Original Article 30 March 2019 Pages: 779 - 791

   

6. Intuitive acceptance of proof by contradiction

   • Samuele Antonini

   Original Article 14 June 2019 Pages: 793 - 806

   

7. Evidence and argument in a proof based teaching theory

   • David A. Reid
   • Estela A. Vallejo Vargas

   Original Article 28 January 2019 Pages: 807 - 823

   

8. Evidence, proofs, and derivations

   • Andrew Aberdein

   Original Article 09 April 2019 Pages: 825 - 834

   

9. Teaching reader engagement as an aspect of proof

   • Henrik Kragh Sørensen
   • Kristian Danielsen
   • Line Edslev Andersen

   Original Article 03 May 2019 Pages: 835 - 844

   

10. Aspects of freedom in mathematical proof

    • Gregor Nickel

    Original Article 23 July 2019 Pages: 845 - 856

    

11. Studying mathematical practices: the dilemma of case studies

    • Colin Jakob Rittberg
    • Bart Van Kerkhove

    Original Article 07 March 2019 Pages: 857 - 868