Publications
and Presentations

I'm especially excited about a few projects that I have recently published.. One is a book I wrote and edited with Drs. Jennifer Ward, Maria del Rosario Zavala, and Tonya Bartell (along with amazing contributing lesson authors) called Early Elementary Mathematics Lessons to Explore, Understand, and Address Social Justice: Grades PreK-2. I also have three non-fiction children's books that I have recently co-written with Dr. Matt Felton. Finally, I have an edited book with Dr. Eva Thanheiser that centers the work of teacher educators and how we attempt to build and sustain community as a way to move towards more equitable and just action in mathematics education.

PUBLICATIONS, CREATIVE ACTIVITIES, AND PRESENTATIONS

Books

Koestler, C. and Thanheiser. E. (Eds.). (submitted, anticipated publication Summer 2024). Building community to center equity and justice in mathematics teacher education: Association of Mathematics Teacher Educators professional book series. IAP.

Felton-Koestler and Koestler, C. (2023). Data in your world: Understanding finances. Carson-Dellosa Publishing.

Koestler, C., Ward, J., Zavala, M. d. R., and Bartell, T. (2023). Early childhood mathematics lessons to explore, understand, and respond to social injustice. Corwin Press/National Council of Teachers of Mathematics.

Koestler, C. and Felton-Koestler, M. (2022). Data in your world: Exploring our schools. Carson-Dellosa Publishing.

Felton-Koestler, M. and Koestler, C. (2022). Data in your world: Communities near and far. Carson-Dellosa Publishing.

Koestler, C., Felton, M. D., Bieda, K., and Otten, S. (2013). Connecting the NCTM Process Standards and the Common Core State Standards for Mathematics Practices to improve instruction. National Council of Teachers of Mathematics.

Professional Journals

Thanheiser, E., Koestler, C., Sugimoto, A. T., & Felton-Koestler, M. D. (2023). Construct it! What’s in a name? Collecting, organizing, and representing data. Mathematics Teacher: Learning and Teaching PK-12, 116(10), 746-752.

Thanheiser, E., & Koestler, C. (2021). If the world were a village: Learning mathematics while learning about the world. Mathematics Teacher Educator, 9(3), 202-228. https://doi.org/10.5951/MTE.2020.0021

Bartell, T., Koestler, C., & Foote, M. Q. (2021). Mathematics teachers’ understanding of privilege and oppression. Mathematics Teacher Educator, 9(3), 168-183. https://doi.org/10.5951/MTE.2020.0014

Hallman-Thrasher, A., Lui, C., Koestler, C., Strachota, S., & Thompson, J. (2021). Designing and implementing a STEM summer camp. Technology and Engineering Teacher, 81(4), 20-25.

Hallman-Thrasher, A., Koestler, C., Dani, D., Kolbe, A., & Lyday, K. (2018). Graphing stories for a three-act task. Mathematics Teaching in the Middle School, 24(2), 90-96. https://doi.org/10.5951/mathteacmiddscho.24.2.0090

Felton-Koestler, M. D., & Koestler, C. (2017). Should mathematics teacher education be politically neutral? Mathematics Teacher Educator, 6(1), 67–72. https://doi.org/10.5951/mathteaceduc.6.1.0067

Felton, M. D., & Koestler, C. (2015). “Math is all around us and...we can use it to help us”: Teacher agency in mathematics education through critical reflection. The New Educator. 1(4), 260-276. https://doi.org/10.1080/1547688X.2015.1087745

Felton, M. D. and Koestler, C. (2012). “Questions and answers can mean something”: Supporting critical reflection in mathematics education. In R. Flessner, G. Miller, K. Patrizio, J. and Horwitz (Eds.) Agency through teacher education: Reflection, community, and learning (pp. 25-35). Rowman & Littlefield Education.

Published Conference Proceedings

Koestler, C., Felton-Koestler, M., Thanheiser, E., and Sugimoto, A. (accepted). Core practices central to connecting mathematics to social and political issues when designing and implementing tasks in elementary classrooms. Proceedings of the 15th annual meeting of the International Congress on Mathematical Education. Sydney, Australia.

Robinson, M., Thanheiser, E., Sugimoto, A., Penner, D., Han, S. B., Koestler, C., Felton-Koestler, M. D., Bartels, H. E., Thompson, J. A., and Wolfe, L. (2023). Building community in a research project team through identity sharing. In A. E. Lischka., E. B. Dyer, E. S. Jones, J. Lovett, J. Strayer, & S. Drown (Eds) Proceedings of the 44th annual meeting of the North American Chapter of the International Group for the Psychology of Mathematics Education (pp. 479-487). Middle Tennessee State University.

Han, S. B., Thanheiser, E., Sugimoto, A., Robinson, M., Koestler, C., Felton-Koestler, M. D., Thompson, J. A., Bartels, H. E., and Wolfe, L. (2023). Connecting mathematics to the real world: One group of elementary mathematics teachers’ experience. In A. E. Lischka., E. B. Dyer, E. S. Jones, J. Lovett, J. Strayer, & S. Drown (Eds) Proceedings of the 44th annual meeting of the North American Chapter of the International Group for the Psychology of Mathematics Education (pp. 1395-1399). Middle Tennessee State University.

Scroggins, A., Hand, V., Herbel-Eisenmann, B., Byun, S., Koestler, C., and Bartell, T., (2018). Missing the brilliance of scholars of color: Mathematics teacher educator discourse in a white zone of proximal development. 13th International Conference of the Learning Sciences (ICLS) (pp. 1141-1144). London, UK: International Society of the Learning Sciences.

Larnell, G. V., LópezLeiva, C. A., Scroggins, A. D., Amidon, J., Foote, M. Q., Hand, V. M., Herbel-Eisenmann, B., Koestler, C., and Wager, A. A. (2016). Challenging the reframing of equity in mathematical systems: access, agency, and allies. In M. B. Wood, E. E. Turner, M. Civil, & J. A. Eli (Eds.), Proceedings of the 38th annual meeting of the North American Chapter of the International Group for the Psychology of Mathematics Education (p. 1608- 1611). The University of Arizona.

Book Chapters

Koestler, C., Thanheiser, E., Kalinec-Craig, C,., Yeh, C., Jessup, N. and Wager, A. (in press, expected Spring 2024). Justice-oriented mathematics education: A conversation among early childhood and elementary mathematics teacher educators. In B. Benken’s (Ed.) Reflection on Past, Present and Future:

Paving the Way for the Future of Mathematics Teacher Education. IAP.

Hallman-Thrasher, A., Koestler, C., Chen, L., Thompson, J., Heacock, K., & Dani, D. (in press). Using representations in a pattern task to promote student generalization. In D. Polly, E. Garvin, & C. Martin (Eds.), Clinically Based Teacher Education in Action: Cases from Mathematics Education. Information Age Publishing.

Koestler, C., Newton, J. and McGarry, J. (2023). Challenging ableist assumptions in mathematics problems. In T. Bartell, C. Yeh, M. Felton-Koestler, & R. Q. Berry III’s Upper elementary mathematics lessons to explore, understand, and respond to social injustice (pp. 124-132). Corwin Press/National Council of Teachers of Mathematics.

Guzman, L., Craig, J., Thanheiser, E., Raygoza, M. C., and Koestler, C. (2023). Upper elementary mathematics to explore people represented in our world and community. In T. Bartell, C. Yeh, M. Felton-Koestler, & R. Q. Berry III’s Upper elementary mathematics lessons to explore, understand, and respond to social injustice (pp.204-215). Corwin Press/National Council of Teachers of Mathematics.

Felton-Koestler, M and Koestler, C. (2023). 3D Modeling for Water Lesson. In B. Conway IV., L. Id-Deen, M. C. Raygoza, A. Ruiz, J. W. Staley, & E. Thanheiser’s Middle school lessons to explore, understand, and respond to social injustice (pp. 254-262). Corwin Press/National Council of Teachers of Mathematics.

Raygoza, M. C., Thanheiser, E., Koestler, C., Craig, J., and Guzman, L. (2023). Middle school mathematics to explore people represented in our world and community. In B. Conway IV., L. Id-Deen, M. C. Raygoza, A. Ruiz, J. W. Staley, and E. Thanheiser’s, Middle School lessons to explore, understand, and respond to social injustice (pp. 115-123). Corwin Press/National Council of Teachers of Mathematics.

Helfrich, S., Hartman, S.L., Dani, D., Felton-Koestler, M., Harrison, L., Koestler, C., Gut, D., Keifer Kennedy, M., Hicks, S., & Middleton, R. (2023). A reimagined research-based clinical model of educator preparation. In S.R. Helfrich and S.L. Hartman (Eds.), Exemplary Clinical Models of Teacher Preparation. Information Age Publishing.

Hand, V., Herbel-Eisenmann, B., Byun, S., Koestler, C. and Bartell, T. (2021). Tensions and failures in an analysis of whiteness among a racially and socially diverse group of mathematics teacher educators. In Andersson, A. & Barwell, R. (Eds.) Applying critical mathematics education (pp. 123–143). Brill.

Koestler, C. (2016) Challenging and disrupting deficit notions in our work with early childhood and elementary teachers. In D. Y. White, S. Crespo, & M. Civil (Eds.). Cases for teacher educators: Facilitating conversations about inequities in mathematics classrooms (pp. 113-120). Association of Mathematics Teacher Educators and Information Age Publishing.

Koestler, C. (2012). Beyond apples, puppy dogs, and ice cream: Preparing prospective K-8 teachers to teach mathematics for equity and social justice. In A. Wager and D. Stinson (Eds.) Teaching mathematics for social justice: Conversations with educators (pp. 81-98). National Council of Teachers of Mathematics.

Other Kinds of Publications

Koestler, C., Ward, J., Zavala, M. d. R., and Bartell, T. (2022, Sept. 22) Why use math to help young learners explore understand and respond to social injustice? Corwin Connect. https://corwin-connect.com/2022/09/why-use-math-to-help-young-learners-explore-understand-and-respond-to-social-injustice/

Dani, D., Koestler, C., & Chen, L. (2022, Summer). STEM integration in field experience for mathematics and science teachers. AMTE Connections: Integrating across disciplines and areas in mathematics teacher education, 5, 1-7. https://amte.net/connections/2022/05/connections-thematic-articles-integration-mathematics-teacher-education

Manuscripts Submitted/In preparation

Zavala, M., Ward, J, & Koestler, C., Bartell, T. (under review). Building on students’ agency, empathy, and mathematics ingenuity. In A. Friesen, M. Mitsch, & K. Du’s (Eds). Advancing Equity and Inclusion in Early Childhood Education.

Wager, A., Thanheiser, E., Koestler, C., Yeh, C., Kalinec-Craig, C., and Jessup, N. (in preparation). Critical literacy in mathematics teacher education.

Koestler, C. (in preparation). Leveraging collaboration to create opportunities for the development of children's agency and critical literacy.

Koestler, C. (in preparation). Mathematics class as a space for productive struggle to build excitement, engagement, and equity at the elementary level.

Koestler, C. and Thanheiser, E. (in preparation) Critical mathematics literacy: An example using a data representation and analysis activity.

Thanheiser, E. and Koestler, C. (in preparation). Data visualization: Creating and connecting representations to understand and communicate real world data.

Other Media and Creative Activities

Thanheiser, E., Koestler, C., Sugimoto, A., and Felton-Koestler, C. (2022, May 10). Connecting math to the real world. [Video]. Featured at the 2022 STEM for All Video Showcase: Access, inclusion, and equity. https://stemforall2022.videohall.com/presentations/2508.html

Dani, D., Hallman-Thrasher, A. H., Koestler, C., Lui, C., Sandler, N., Stigall, A., and Parsons, J. (2022, May 10). RALLY for STEM. [Video]. Featured at the 2022 STEM for All Video Showcase: Access, Inclusion, and Equity. https://stemforall2022.videohall.com/presentations/2482.html

Koestler. C. and Thanheiser, E. (2022, May 4). Building community to center equity and justice in mathematics teacher education. [Audio podcast episode]. In Teaching Math Teaching Podcast, sponsored by the Association of Mathematics Teacher Educators. Hosted by Joel Amidon. https://www.teachingmathteachingpodcast.com/63

Bartell, T., Koestler, C., and Foote, M. Q. (2021, Dec.) Mathematics teachers’ understanding of privilege and oppression. [Audio podcast episode]. In Mathematics Teacher Educator Podcast. Hosted by Eva Thanheiser. https://mtepodcast.amte.net/34

Koestler, C., and Thanheiser. (2021, Dec. 15) If the world were a village: Learning mathematics while learning about the world. [Audio podcast episode]. In Mathematics Teacher Educator Podcast. Hosted by Eva Thanheiser. https://mtepodcast.amte.net/35

Koestler, C., Jessup, N. and Thanheiser, E. (2021, May 3) Teaching is never neutral. [Audio podcast episode]. In Jabbedu Podcast. Hosted by Jonathan Ruths. https://jabbedu.com/show41/

Koestler, C. and Felton-Koestler, M. (2020, March 22) How to run math summer camps podcast. In Teaching Math Teaching Podcast, sponsored by the Association of Mathematics Teacher Educators. Hosted by Dusty Jones, Eva Thanheiser, and Joel Amidon. https://www.teachingmathteachingpodcast.com/4

Koestler, C. (2019, Oct. 30). Teaching is never neutral. Patton College of Education EDTalk. [Video]. https://bit.ly/KoestlerEDTalk

Koestler, C. (2018, June 15). Encouraging invented algorithms to support more equitable and child-centered classrooms, Part 2 [Invited blog post]. My NCTM.

https://my.nctm.org/blogs/courtney-koestler/2018/06/15/encouraging-invented-algorithms-to-support-more-eq

Koestler, C. (2018, May 30). Encouraging invented algorithms to support more equitable and child-centered classrooms [Invited blog post]. My NCTM. https://my.nctm.org/blogs/courtney-koestler/2018/05/30/encouraging-invented-algorithms-to-support-more-eq

Koestler, C. (2017, Nov. 28). Math and Science Teaching Challenges with Dr. Courtney Koestler. [Audio podcast]. In Teaching Matters, from WOUB Public Media. Hosted by Scott Titsworth. http://www.npr.org/podcasts/514312608/teaching-matters.

SELECTED PRESENTATIONS

Presentations for University Faculty at International and National Conferences

Lee-Hassan, A., Garner, B., Koestler, C. & Whipple, K. (2024, Feb.) Let’s say gay: Queer and queer-allied mathematics teacher educators coming together for art and action. Association of Mathematics Teacher Educators Annual Conference. Orlando, FL.

Han, S. B., Sugimoto, A., Koestler, C., Felton-Koestler, M., Robinson, M., Thompson, J., & Wolfe, L. L.

Graphing names task: A window, mirror, and sliding glass door for students and mathematics teacher educators. Association of Mathematics Teacher Educators Annual Conference. Orlando, FL.

Koestler, C., Thompson, J., Robinson, M., Thanheiser, E., Sugimoto, A., Felton-Koestler, M.D., Han, S., Bartels, H., Wolfe, L. (2023, Feb.). Community, curiosity, and criticality in justice-oriented mathematics teaching. Association of Mathematics Teacher Educators Annual Conference. New Orleans, LA.

Garner, B., Koestler, C., , Lee-Hassan, Alexa W. C., Whipple, K. S., Pruitt-Britton, T. (2023, Feb.). Moving beyond performative allyship in mathematics teacher education to support LGBTQ+ students, teachers, and MTEs. Association of Mathematics Teacher Educators Annual Conference. New Orleans, LA.

Ward, J., Id-Deen, L., Koestler, C., Yeh, C., Bartell, T., Zavala, M. d. R., Thanheiser, E., Felton-Koestler, M.D., and Conway, B.. (2023, Feb.). Social justice mathematics in early childhood through middle school methods courses. Association of Mathematics Teacher Educators Annual Conference. New Orleans, LA.

Koestler, C. (2022, June). Developing an engaging, justice-oriented early childhood diversity course. National Association of Early Childhood Teacher Educators. (online)

Thanheiser, E. and Koestler, C. (2022, March). Critical literacy in the mathematics classroom. National Association of Multicultural Education. (online)

Whipple, K., Koestler, C., Garner, B., Foster, J. Cordero-Siy, E., and Bailey, N. (2022, Feb.). LGBTQ+ (micro)aggressions in mathematics teacher education. National Association of Mathematics Teacher Educators. Las Vegas, NV. (online)

Wolfe, A. and Koestler, C. (2021, June). Supporting and exploring early elementary teachers’
pandemic pedagogies with artwork. National Association of Early Childhood Teacher Educators. (online)

Koestler, C. and Whipple, K. (2021, Feb.) LGBTQ+ safer spaces workshop: Essential in mathematics teacher education programs and professional development. Association of Mathematics Teacher Educators. (online)

Ward, J., Raygoza, M., Baker, K., Smith, E., Jessup, N., and Koestler, C. (2021, Feb.). Becoming mathematics teacher educator parentscholar activists: Making visible our strengths and navigating the challenges. Association of Mathematics Teacher Educators. (online)

Bartell, T. G., Koestler, C., Amidon, J. (2020, Feb.) Supporting mathematics teachers’ understanding of privilege and oppression: A critical examination. Association of Mathematics Teacher Educators. Phoenix, AZ.

Dubbs, C., Koestler, C. and Whipple, K. (2020, Feb.) LGBTQQ+ responsive mathematics teacher education: Comparing experiences across contexts. Association of Mathematics Teacher Educators. Phoenix, AZ.

Koestler, C. Hartman, S. L., Felton-Koestler, M. (2019, Feb.) From local events to national news: Addressing social, political, and cultural issues with teacher candidates. American Association of Colleges for Teacher Education. Louisville, KY.

Koestler, C. (2019, Feb.) Using vignettes to prepare teachers to support and advocate for LGBTQQ+ students, families, and colleagues. American Association of Colleges for Teacher Education. Louisville, KY.

Koestler, C., Whipple, K., and Dubbs, C. (2019, Feb. ). Using vignettes to prepare mathematics teachers to advocate for LGBTQQ+ students, families, and colleagues. Association of Mathematics Teacher Educators. Orlando, FL.

Amidon, J. Foote, M. Q., Koestler, C., Harper, F. Bartell, T. G. (2019, Feb.). Double vision: Considering different perspectives on professional development task modules to promote equitable mathematics instruction. Association of Mathematics Teacher Educators. Orlando, FL.

Thanheiser, E., Rosencrans, B., Osa, J., Felton-Koestler, M. and Koestler, C (discussant) (2019, Feb.). "It just got real!”: Integrating social and political issues in preservice elementary mathematics content courses. Association of Mathematics Teacher Educators. Orlando, FL.

Celedon-Pattichis, S., Lunney-Borden, L., Drake, C., Aguirre, J., Koestler, C., Lopez Leiva, C., and Roth McDuffie, A. (April, 2018). Asset-based approaches to mathematics education research and practice: NCTM research commentary. National Council of Teachers of Mathematics Research Conference. Washington, DC.

Koestler, C. and Felton-Koestler, M. (2018, March). Supporting prospective teachers to elucidate and understand children's mathematical thinking. American Association of Colleges of Teacher Education. Baltimore, MD.

Koestler, C., Whipple, K., Dubbs, C., and Jacobs, J. (2018, Feb.). Mathematics teacher educators’ responsibilities and roles in advocating for lgbtqq+ students, teachers, and other math teacher educators. Association of Mathematics Teacher Educators. Houston, TX.

Herbel-Eisenmann, B, Hand, V., Scroggins, A., Byun, S., and Koestler, C., and Bartell, T. (2018, Feb.) Seeing power and whiteness: A critical self-examination on design of equity-oriented professional development. Association of Mathematics Teacher Educators. Houston, TX.

Koestler, C., Amidon, J., Wager, A. A., and Foote, M. (2017, Feb). Facilitating a mathematics professional development collaboration as allies with teacher-colleagues. Association of Mathematics Teacher Educators. Orlando, FL.

Sturgill, D. and Koestler, C. (2017, Feb.) Classroom inquiry as a means of developing teachers and promoting more equitable classrooms. Association of Mathematics Teacher Educators. Orlando, FL.

Herbel-Eisenmann, B. Foote, M. Q., Bartell, T., Koestler, C., Amidon, J., Yolcu, A., and Jones, D. (2016, Jan.) Access, agency and allies: a systematic approach to addressing an equitable system. Association of Mathematics Teacher Educators. Irvine, CA.

Amidon, J. Koestler, C., Harper, F. Herbel-Eisenmann, B. Wager, A. A., Scroggins, A. D., (2016, Nov.) Negotiating an equitable mathematical system through professional development. North American Chapter of the International Group for the Psychology of Mathematics Education. Tucson, Arizona.

Koestler, C. (2015, March). Action research: Equitable professional development for equitable classrooms. Teaching and Learning Conference, presented by the National Board for Professional Teaching Standards. Washington, DC.

Koestler, C., Sudnick, N., and Douglas, M. (2015, March). Becoming and supporting school-based teacher leaders. Teaching and Learning Conference, presented by the National Board for Professional Teaching Standards. Washington, DC.

Koestler, C. and Jilk, L. (2015, Feb.) The role of critique of the Common Core in teacher education. Association of Teacher Educators. Phoenix, AZ.

Gunckel, K. and Koestler, C. (2015, Feb.) Governmental and educational policy and their impact on teaching and teacher education. Association of Teacher Educators. Phoenix, AZ.

Koestler, C. and Jurich, D. (2015, Feb.) Creating equitable spaces for LGBTQQ+ people: Teacher educators’ responsibilities and roles in advocating for all. Association of Teacher Educators. Phoenix, AZ.

Herbel-Eisenmann, B., Koestler, C., and Wager, A. (2015, Feb.) Action research as professional development: Equitable opportunities for teachers in the era of the CCSSM. Association of Mathematics Teacher Educators. Orlando, FL.

Koestler, C. (2014, Nov.) Creating safe and equitable spaces for LGBTQQ+ children and their families: Our responsibilities and roles as teachers and teacher educators. Reconceptualizing Early Childhood Education. Kent State, OH.

Koestler, C., (2014, February). Engaging in critical reflection to unpack, analyze, and question the Common Core Standards. Association of Mathematics Teacher Educators. Irvine, CA.

Koestler, C. (2012, April). Beyond apples, puppy dogs, and ice cream: Preparing prospective k–8 teachers to teach mathematics for equity and social justice. In D. Stinson’s (Chair and Discussant), Teaching teachers mathematics for social justice. National Council of Teachers of Mathematics Research Presession. Philadelphia, PA.

Wood, M., Turner, E., Koestler, C., and Civil, M. (2012, Feb.). Experiences, explanations, and third spaces: A new model for preservice elementary mathematics teacher education. Association of Mathematics Teacher Educators. Dallas, TX.

Koestler, C. (2011, April) Teaching mathematics for social justice: A theoretical and practical framework to understand, examine, and address equity and social justice. In K. Zeichner’s (chair), What do you mean “teaching for social justice?”: Different conceptions in social justice teacher education. American Educational Research Association. New Orleans, LA.

Koestler, C. (2010, May). Using critical reflection to support prospective teachers’ understanding of teaching mathematics for social justice. In K. Zeichner’s (chair), Supporting prospective teachers’ critical reflection: Concepts, practices, and assessment. American Educational Research Association. Denver, CO.

Koestler, C. and Felton, M. D. (2010, January). Supporting prospective teachers in understanding issues of equity, diversity, and social justice in mathematics education. Association of Mathematics Teacher Educators. Irvine, CA.

Hand, V. and Koestler, C. (2009, April). Managing status as an entrée to teaching for equity.

American Educational Research Association. San Diego, CA.

Koestler, C., Aguirre, J., Celedon-Pattichis, S., Chan, A., Park, J., & Turner, E. (2009, February). Exploring issues of diversity, equity, and social justice in mathematics teacher education courses. Association of Mathematics Teacher Educators. Orlando, FL.

Koestler, C. (2008, April). Supporting pre-service teachers in broadening their perspectives of school mathematics. National Council of Teachers of Mathematics Research Presession. Salt Lake City, UT.

Franke, M., Schoenfeld, A., Battey, D., Chan, A., Enyedy, N., Erickson, F., Esmonde, I., Foote, M., Landers, M., Koestler, C., Hand, V., Ho, K., Mukhopadhyay, S., Pitts Bannister, P., Spencer, J., Taylor, E., & Wager, A. (DiME faculty & fellows) (2008, March). Foregrounding issues of equity and diversity in mathematics education research: Implications for research methods and teacher development. Special professional development course session. American Educational Research Association, New York, NY.

Koestler, C. (2008, March). Broadening perspectives: Examining pre-service teachers’ conceptions of mathematics. American Educational Research Association. New York, NY.

Presentations for PreK-12 School Teachers at National and State Conferences

Koestler, C. (2024, March). Building Community and Critical Literacy Using Cross-Curricular Units. Ohio Council for Teachers of English and Language Arts. Columbus, OH.

Koestler, C., Felton-Koestler, M., Pearce, K., & Moreland, B. (2023, Oct.) Integrating art and math to build community and support collaboration. Ohio Council of Teachers of Mathematics. Sandusky, Ohio.

Koestler, C., Ward, J., and Zavala, M. (2023, March). Early elementary mathematics lessons to explore, understand, and respond to social injustice. National Council of Teachers of Mathematics Virtual Conference & Exposition. (Listed as “Featured Speaker” on the program.)

Koestler, C. (2022, Nov.). Early elementary mathematics lessons to explore, understand, and respond to social injustice. National Council of Teachers of Mathematics Regional Conference & Exposition. Baltimore, MD.

Koestler, C. (2022, Nov.). Upper elementary mathematics lessons to explore, understand, and respond to social injustice. National Council of Teachers of Mathematics Regional Conference & Exposition. Baltimore, MD.

Koestler, C. and Felton-Koestler, M. (2022, Oct.). Mathematics to explore, understand, and respond to social injustice at the PreK-5 levels. Ohio Council of Teachers of Mathematics. Cincinnati, Ohio.

Felton-Koestler, M., Koestler, C., Thompson, J., and Bartels, H. (2022, Oct.). Developing and implementing a summer camp designed to connect mathematics to the real world. Ohio Council of Teachers of Mathematics. Cincinnati, Ohio.

Thompson, J., Koestler, C., Quitter, K, and Sherman, C. (2022, Oct.). Interested in submitting an idea for an OCTM session at next year’s conference, but not sure how to get started? Come join us! Ohio Council of Teachers of Mathematics. Cincinnati, Ohio.

Koestler, C., Thompson, J., Felton-Koestler, M. (2021, Oct.) Using math task routines to
encourage equitable participation. Ohio Council of Teachers of Mathematics. (online)

Graber, B., Crawford, A., and Koestler, C. on behalf of the OCTM Diversity and Inclusion Task Force. (2021, Oct.) Supporting LGBTQ+ students and families in PreK-12+ math Classrooms. Ohio Council of Teachers of Mathematics. (online)

Caniglia, J., Koestler, C., and Gorsuch, R. and Courtney Koestler, C. (2021, Oct.) Ins(pi)reUP 2.0 followup. Ohio Council of Teachers of Mathematics. (online)

Caniglia,J., Gorsuch, R., and Koestler, C. (2021, Oct.) Ins(pi)reUP 2.0. Ohio Council of Teachers of Mathematics. (online)

Thanheiser, E. and Koestler, C. (2021, March) Connecting math learning to learning about our world in PreK-12: Critical literacy in the math classroom. Teachers Development Group Leadership Seminar. (online)

Caniglia, J., Koestler, C., Lehmkuhl, J., and Gorsuch, R. (January 2021). Ins(pi)reUP Series, "The art of teaching, resources, and strategies." Ohio Council of Teachers of Mathematics. (online)

Koestler, C. (2020, Oct). Supporting LGBTQQ+ students, families, and colleagues: Our responsibilities as mathematics teachers. Ohio Council of Teachers of Mathematics. (online).

Koestler, C., Mason, Molly, & Amlin, T. (2019, Oct.) Fun and mathy ways to support counting and problem solving skills in early childhood classrooms. Ohio Council of Teachers of Mathematics. Sandusky, OH.

Koestler, C. and Felton-Koestler, M. (2019, Oct.) Planning and facilitating summer math camps that incorporate social and political issues. Ohio Council of Teachers of Mathematics. Sandusky, OH.

Koestler, C. (2018, April). Supporting child-invented algorithms for addition and subtraction for more equitable K–5 classrooms. National Council of Teachers of Mathematics. Washington, DC.

Koestler, C. (2018, Oct.) Supporting LGBTQ+ students, families, and colleagues: Our responsibilities as mathematics teachers. Ohio Council of Teachers of Mathematics. Akron, OH.

Koestler, C. and Gibbs, A. (2018, Oct.) Early childhood mathematics: Noticing the brilliance of children's thinking. Ohio Council of Teachers of Mathematics. Akron, OH.

Koestler, C. (2017, Oct.) Child-invented strategies for addition and subtraction. Ohio Council of Teachers of Mathematics. Columbus, OH.

Sudnick, N., Ulbrich, C., Douglas, M., Vogt, C., Dupler, J., & Koestler, C. (2017, Oct.) Continuing the journey: Creating district-wide change to support child-centered teaching at the elementary level. Ohio Council of Teachers of Mathematics. Columbus, OH.

Koestler, C. & Kuchey, D. (2017, Oct.) Educational resources at our fingertips. Ohio Council of Teachers of Mathematics. Columbus, OH.

Koestler, C. and Sudnick, N. (2016, Oct.) Creating district-wide mathematics change to support K-6 teachers and students: Successes and tensions. Ohio Council of Teachers of Mathematics. Sandusky, OH.

Koestler, C. and Lipnos, M. (2016, Oct.) Designing and enacting a book study: How do I start one? Ohio Council of Teachers of Mathematics. Sandusky, OH.

Sturgill, D. and Koestler, C. (2016, Oct.) Supporting teachers and providing opportunities for student learning: A professional development focused on classroom inquiry and action research. Ohio Council of Teachers of Mathematics. Sandusky, OH.

Koestler, C. (2015, Oct.) Using mathematics to understand our world: Teaching mathematics for equity and social justice. Ohio Council of Teachers of Mathematics. Cincinnati, OH.

Gold, L, Sturgill, D., and Koestler, C., (2015, Oct.) Using children’s strategies to build understanding: Cognitively Guided Instruction. Ohio Council of Teachers of Mathematics. Cincinnati, OH.

Sturgill, D, Gold, L., Koestler, C. (2015, Oct.) Using groupwork to support more equitable math classrooms. Ohio Council of Teachers of Mathematics. Cincinnati, OH.

Koestler, C., Hines, A. and Lenahan, K. (2015, May). Supporting LGBTQQ+ children and gender identity development: Our responsibilities as early childhood educators. Ohio Association for the Education of Young Children. Cleveland OH.

Koestler, C. (2014, Oct.) Lessons learned from the Common Core Collaborative. University of Arizona. Tucson, AZ.

Koestler, C. (2014, April). How and why to teach fractions in the primary grades. National Council of Teachers of Mathematics. New Orleans, LA.

Felton, M. D., & Koestler, C. (2013, April). Standards for Mathematical Practice in elementary classrooms. National Council of Teachers of Mathematics. Denver, CO.

Koestler, C., & Felton, M. D. (2013, April). Empowering students: Social justice mathematics teaching in elementary classrooms. National Council of Teachers of Mathematics. Denver, CO.

Koestler, C. (2013, September). How and why to teach fractions in the primary grades. Arizona Association of Teachers of Mathematics. Phoenix, AZ.

Koestler, C. (2010, October). Supporting children's number sense and computation: Alternative algorithms for addition, subtraction, multiplication, and division. Arizona Association of Teachers of Mathematics. Arizona State University. Tempe, Arizona.

Koestler, C. (2010, October). An introduction to Cognitively Guided Instruction: A problem solving approach to teaching elementary mathematics. Arizona Association of Teachers of Mathematics. Arizona State University, Arizona.

Koestler, C. (2010, May). Building on children's thinking: Alternative algorithms for addition, subtraction, multiplication and division. Wisconsin Mathematics Council. Green Lake, Wisconsin.

Koestler, C. (2010, May). Integrating issues of equity and social justice in elementary mathematics methods courses. Wisconsin Mathematics Council. Green Lake, Wisconsin.

Koestler, C. (2009, May). Music, movement, and mathematics: Integrating music and movement to support children’s understanding of patterns, multiples, and fractions. Wisconsin Mathematics Council. Green Lake, Wisconsin.

Koestler, C., Carolan, T., Dziedzic, M. (2009, May). Making mathematics meaningful: Supporting your students in using mathematics to analyze their world. Wisconsin Mathematics Council. Green Lake, Wisconsin.

Koestler, C. (2005, April). Alternative algorithms 101: The power of invented methods that reinforce number sense for elementary school students. Virginia Council of Teachers of Mathematics. Williamsburg, Virginia.

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