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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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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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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SELECTED PRESENTATIONS

2023 (*peer-reviewed; **invited)

**Aug 2023 "Towards multi-perspectival approaches to the study of teacher professional vision", Invited discussant of the symposium, “New theoretical and methodological perspectives on teacher professional vision” at the 2023 Biennial Conference of the European Association for Research on Learning and Instruction (EARLI). Thessaloniki, Greece.

*Aug 2023 "On noticing and framing of student mathematical thinking", Presentation at the 2023 Biennial Conference of the European Association for Research on Learning and Instruction (EARLI). Thessaloniki, Greece.

*Jul 2023 "Established and emerging theoretical perspectives of teacher noticing", Presentation in the Research Forum “Innovative research approaches to mathematics teacher noticing” at the 46th Conference of the International Group for the Psychology of Mathematics Education (PME). Haifa, Israel. (w/ Gabriele Kaiser)

**Feb 2023 "Mathematisches Denken von Lernenden als Stärke begreifen", Invited speaker at the Mathematics Education Research Colloquium of the Faculty of Education, Free University of Berlin. Berlin, Germany.

..

2022 (*peer-reviewed; **invited)

**Aug 2022 "Learning to value students’ mathematical ideas: a reorientation in teacher education", Invited speaker at the School of Education of Macquarie University. Sydney, Australia.

*Jul 2022 "Exploring deficit-based and strengths-based framings in noticing student mathematical thinking", Presentation at the 45th Conference of the International Group for the Psychology of Mathematics Education (PME). Alicante, Spain.

*Apr 2022 "Shifting framings in teacher noticing: From deficits to strengths in student mathematical thinking", Presentation at the 2022 Annual Meeting of the American Educational Research Association (AERA). San Diego, CA, USA.

*Feb 2022 "Examining assumptions about the need for teachers to transform subject matter into pedagogical forms accessible to students", Presentation at the 12th Congress of the European Society for Research in Mathematics Education (CERME). Bozen-Bolzano, Italy. (virtual conference)

..

2021 (*peer-reviewed; **invited)

**Dec 2021 "Supporting prospective mathematics teachers in noticing students' mathematical strengths", Invited speaker at the Institute of Education of the University of Lisbon. Lisbon, Portugal.

*Aug 2021 "Modes of dealing with opposing theoretical perspectives in cognitive science", Presentation at the 19th Biennial Conference of the European Association for Research on Learning and Instruction (EARLI). Gothenburg, Sweden. (virtual conference)

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*Aug 2021 "Toward an embodied, cultural, and social view of teacher noticing", Presentation at the 19th Biennial Conference of the European Association for Research on Learning and Instruction (EARLI). Gothenburg, Sweden. (virtual conference)

**Jul 2021 "Critical remarks on the notion of unpacking mathematics in discourses of teacher knowledge", Invited presentation at the 14th International Congress on Mathematical Education (ICME-14, TSG 33). Shanghai, China. (virtual conference)

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*Jul 2021 "On the epistemological significance of contextualizing in mathematical cognition", Presentation at the 14th International Congress on Mathematical Education (ICME-14, TSG 20). Shanghai, China. (w/ Márcia M. F. Pinto) (virtual conference)

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*Jul 2021 "From deficiency to strengths: Prospective teachers’ shifting frames in noticing student mathematical thinking", Presentation at the 43rd Annual Conference of the Mathematics Education Research Group of Australasia (MERGA). Singapore, Singapore. (virtual conference)

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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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2017 (*peer-reviewed; **invited)

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**Dec 2017 "Teacher knowledge: From a kind of knowledge to a style of knowing", Invited speaker 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", Invited speaker at the Faculty of Education of the University of Campinas. Campinas, Brazil.

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**Nov 2017 "Abstraction and sense-making in mathematics", Invited speaker 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", Invited speaker 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", Invited speaker 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", Invited speaker 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", Invited speaker 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 speaker 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 speaker 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.