SELECTED PRESENTATIONS

2020 (*peer-reviewed)

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*Apr 2020 "Using conflicts, tensions, and paradoxes for theory building: the case of conceptual change", Presentation at the 2020 Annual Meeting of the American Educational Research Association (AERA). San Francisco, CA, USA. (conference cancelled due to COVID-19)

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2019 (*peer-reviewed; **invited)

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*Aug 2019 "A critical stance towards pedagogical content knowledge", Presentation at the 18th Biennial Conference of the European Association for Research on Learning and Instruction (EARLI). Aachen, Germany.

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**Jul 2019 "Accounting for changes in teachers' noticing of students' mathematical understanding", Presentation at the University of Huelva. Huelva, Spain.

*Apr 2019 "Toward a model of teacher noticing", Presentation at the 2019 Annual Meeting of the American Educational Research Association (AERA). Toronto, Canada.

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*Apr 2019 "Problematizing pedagogical content knowledge", Presentation at the 2019 Annual Meeting of the American Educational Research Association (AERA). Toronto, Canada.

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2017 (*peer-reviewed; **invited)

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**Dec 2017 "Teacher knowledge: From a kind of knowledge to a style of knowing", Presentation at the Institute of Mathematics of the Federal University of Rio de Janeiro. Rio de Janeiro, Brazil.

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**Dec 2017 "A critical stance toward conceptualizations of teacher knowledge", Presentation at the Faculty of Education of the University of Campinas. Campinas, Brazil.

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**Nov 2017 "Abstraction and sense-making in mathematics", Presentation at the Institute of Mathematics of the Federal University of Rio de Janeiro. Rio de Janeiro, Brazil.

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*Jul 2017 "Conception to concept or concept to conception? From being to becoming", Presentation at the 41st Conference of the International Group for the Psychology of Mathematics Education (PME). Singapore, Singapore.

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*Jul 2017 "Comprehending or creating? On sense-making and meaning-making", Presentation at the 40th Annual Conference of the Mathematics Education Research Group of Australasia (MERGA). Melbourne, Australia.

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*Feb 2017 "Emerging insights from the evolving framework of structural abstraction in knowing and learning advanced mathematics", Presentation at the 20th Annual Conference on Research in Undergraduate Mathematics Education (RUME). San Diego, CA, USA.

2018 (*peer-reviewed; **invited)

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*Aug 2018 "Problematizing knowledge for teaching", Presentation at the 5th African Regional Congress of ICMI on Mathematical Education (AFRICME). Dar es Salaam, Tanzania.

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*Aug 2018 "Contextualizing, complementizing, and complexifying in mathematical cognition", Presentation at the 2018 International Congress of Mathematicians (ICM). Rio de Janeiro, Brazil. (w/ Márcia M. F. Pinto)

**Jul 2018 "Exploring changes in teachers' noticing of students' mathematical understanding", Presentation at the Institute for Learning Sciences and Teacher Education. Brisbane, Australia.

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*Jul 2018 "Sense-making in mathematics: Towards a dialogical framing", Presentation at the 41st Annual Conference of the Mathematics Education Research Group of Australasia (MERGA). Auckland, New Zealand.

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*Jul 2018 "Pedagogical content knowledge reconceived", Presentation at the 41st Annual Conference of the Mathematics Education Research Group of Australasia (MERGA). Auckland, New Zealand.

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**Feb 2018 "On contextualizing, complementizing, and complexifying", Presentation at the Department of Mathematics of the University of California at San Diego. San Diego, CA, USA.

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*Feb 2018 "Mathematics cognition reconsidered: On ascribing meaning", Presentation at the 21st Annual Conference on Research on Undergraduate Mathematics Education (RUME). San Diego, CA, USA.

2016 (*peer-reviewed; **invited)

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**Oct 2016 "Abstraction in mathematics knowing and learning: Toward contextuality, complementarity, and complexity", Presentation in the Mathematics Education Research Colloquium at the University of Bremen. Bremen, Germany.

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**Oct 2016 "Wissenskonstruktionen und Abstraktionsprozesse in der Mathematik: konzeptionelle Erweiterungen und neuere Erkenntnisse", Presentation at the Institute of Development and Research in Mathematics Education of the University of Dortmund. Dortmund, Germany.

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*Aug 2016 "Images of abstraction in mathematics education: Contradictions, controversies, and convergences", Presentation at the 40th Conference of the International Group for the Psychology of Mathematics Education (PME). Szeged, Hungary. (w/ Márcia M. F. Pinto)

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*Aug 2016 "Troubling assertions of pedagogical content knowledge", Presentation at the 40th Conference of the International Group for the Psychology of Mathematics Education (PME). Szeged, Hungary.

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*Jul 2016 "Are we trapped in old habits? Revisiting ways of thinking in conceptualizing teacher knowledge", Presentation at the 13th International Congress on Mathematical Education (ICME-13, TSG46). Hamburg, Germany.

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*Jul 2016 "Abstraction in mathematics: Taking account for the increasing complexity and context-sensitivity of the knowledge system", Presentation at the 13th International Congress on Mathematical Education (ICME-13, TSG27). Hamburg, Germany. (w/ Márcia M. F. Pinto)

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*Apr 2016 "Crossing the boundaries of our historical ways of thinking in conceptualizing teacher knowledge", Presentation at the Annual Meeting of the American Educational Research Association (AERA). Washington, DC, USA.

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*Apr 2016 "Making sense of students' sense-making: Revisiting the case of Colin through the lenses of the structural abstraction framework", Presentation at the 1st Conference of the International Network for Didactic Research in University Mathematics (INDRUM). Montpellier, France. (w/ Márcia M. F. Pinto)

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Mar 2016 "PCK im Spannungsfeld von Transmission und Konstruktion", Presentation at the 50th Annual Meeting of the German-speaking Society of Didactics of Mathematics (GDM). Heidelberg, Germany.

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2015 (*peer-reviewed; **invited)

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*Aug 2015 "Conceptualization of teachers' knowledge: Shifting the attention to the nature and form", Presentation at the 16th Biennial Conference of the European Association for Research on Learning and Instruction (EARLI). Limassol, Cyprus.

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*Aug 2015 "Examining (mathematics) teachers' professional knowledge through various theoretical lenses: A research agenda", Presentation at the 19th Conference of the Junior Researchers (JURE) of the European Association for Research on Learning and Instruction (EARLI). Limassol, Cyprus.

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*Jul 2015 "Shifting the emphasis toward a structural description of (mathematics) teachers' knowledge", Presentation at the 39th Conference of the International Group for the Psychology of Mathematics Education (PME). Hobart, Australia.

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*Jul 2015 "A structural abstraction point of view on a student's particular (re-)construction of the limit concept of a sequence", Presentation at the 39th Conference of the International Group for the Psychology of Mathematics Education (PME). Hobart, Australia. (w/ Márcia M. F. Pinto)

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*Jun 2015 "Theorizing about mathematics teachers' professional knowledge: The content, form, nature, and source of teachers' knowledge", Presentation at the 38th Annual Conference of the Mathematics Education Research Group of Australasia (MERGA). Sunshine Coast, Australia.

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*Jun 2015 "Examining a student's resource for reconstructing the limit concept at need: A structural abstraction perspective", Presentation at the 38th Annual Conference of the Mathematics Education Research Group of Australasia (MERGA). Sunshine Coast, Australia. (w/ Márcia M. F. Pinto)

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**May 2015 "Why research on (mathematics) teachers' knowledge needs new directions", Invited Presentation at the Teaching and Learning Seminar at the Faculty of Science of the University of the Western Cape. Cape Town, South Africa.

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**May 2015 "Revisiting the original conceptualization of teachers' knowledge: A need to shift the emphasis", Invited Presentation at the Department of Curriculum Studies of the University of Stellenbosch (Research Unit for Mathematics Education). Stellenbosch, South Africa.

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Feb 2015 "Eine multiperspektive Analyse des Lehrerprofessionswissens: ein konzeptioneller Rahmen", Presentation at the 49th Annual Meeting of the German-speaking Society of Didactics of Mathematics (GDM). Basel, Switzerland.

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*Feb 2015 "Lessons we have (not) learned from past and current conceptualizations of mathematics teachers' knowledge", Presentation at the 9th Congress of European Research in Mathematics Education (CERME). Prague, Czech Republic.