Research Publications

Ratnayake, I. Ahl, L. M., Prytz, J. & Jankvist, U. T. (2025). Examining the impact of facilitator-researcher collaboration on teacher professional development in BM and MIST initiatives. In Skott, C.K., Blomhøj, M., Eckert, A., Elicer, R., Herheim, R., Kristinsdóttir, B., Larsen, D.M., Nortvedt, G.A., Nyström, P., Sigurjónsson, J.Ö., Tamborg, A. L. (Eds.). Proceedings of the NORMA Conference , pp. 289-296

Ratnayake, I., Ahl, L. M., Prytz, J. & Jankvist, U. T. (2024). From innovation to impact: Factors shaping the scaling success of the TRIUMPHS project. In T. Evans, O. Marmur, J. Hunter, G. Leach, & J. Jhagroo (Eds.). Proceedings of the 47th Conference of the International Group for the Psychology of Mathematics Education , pp. 49-56

Prytz, J., Ahl, L. M. & Jankvist, U. T. & Ratnayake, I. (2024). Psychological Theory and Innovations in Reforms of Mathematics Education – A Question of Discourse and Grammar. In T. Evans, O. Marmur, J. Hunter, G. Leach, & J. Jhagroo (Eds.). Proceedings of the 47th Conference of the International Group for the Psychology of Mathematics Education , pp. 25-32

Ratnayake, I., Ahl, L. M., Prytz, J. & Jankvist, U. T. (2023). A comparison of the implementation of two large-scale innovations in mathematics education: TRIUMPHS and Boost for Mathematics. In P. Drijvers, C. Csapodi, H. Palmér, K. Gosztonyi, & E. Kónya (Eds.). Proceedings of the Thirteenth Congress of the European Society for Research in Mathematics Education (CERME13) , pp. 4363-4371

Ratnayake, I., Takker, S., Adler, J. & Pournara, C. (2022). Developing tools to analyse secondary teachers' mathematical knowledge for teaching basic geometry. In J. Hodgen, E. Geraniou, G. Bolondi, & F. Ferretti (Eds.). Proceedings of the Twelfth Congress of the European Society for Research in Mathematics Education (CERME12) , pp. 750-757

Takker, S., Ratnayake, I., Pournara, C. & Adler, J. (2022). Framework for analysing secondary mathematics teachers' development of geometric reasoning. In C. Fernández, S. Llinares, A. Gutiérrez, & N. Planas (Eds.). Proceedings of the 45th Conference of the International Group for the Psychology of Mathematics Education , pp. 83-90

Fielding-Wells, J., Geiger, V., Miller, J., Bruder, R., Roder, U. & Ratnayake, I. (2019). Designing challenging online mathematical tasks for initial teacher education: Motivational considerations. In M. Graven, H. Venkat, A. Essien & P. Vale (Eds.). Proceedings of the 43rd Conference of the International Group for the Psychology of Mathematics Education , pp. 240-247

Ratnayake, I., & Thomas, M. O. J. (2018). Documentational genesis during teacher collaborative development of tasks incorporating digital technology. In V. Gitirana, T. Miyakawa, M. Rafalska, S. Soury-Lavergne, & L. Trouche (Eds.). Re(s)sources 2018 Conference: Understanding teachers' work through their interactions with resources for teaching , pp. 219-222

Ratnayake, I., Thomas, M. & Kensington-Miller, B. (2017). Confidence and collaboration in teacher development of digital technology tasks. In Kaur, B., Ho, W. K. Toh, T. L. & Choy, B. H. (Eds.). Proceedings of the 41st Conference of the International Group for the Psychology of Mathematics Education , pp. 81-88

Ratnayake, I., Oates, G., & Thomas, M. O. J. (2016). Supporting teachers developing mathematical tasks with digital technology. In White, B., Chinnappan, M. & Trenholm, S. (Eds.). Opening up mathematics education research (Proceedings of the 39th annual conference of the Mathematics Education Research Group of Australasia) , pp. 543-551

Sanders, Y., Ratnayake, I. & Moodley, V. (2021). Two negatives make a positive? Navigating integer errors. Proceedings of the 26th Annual National Congress (online) of the Association for Mathematics Education of South Africa

Ratnayake, I., Bruder, R., Mammana, M. F. & Taranto, E. (2020). Supporting teachers in choosing mathematics learning videos. In L. G. Chova, A. L. Martínez, I. C. Torres (Eds.). Proceedings of EDULEARN20 Conference , pp. 3022-3031 doi:10.21125/edulearn.2020.0897

Ratnayake, I., Bruder, R., Johlke, F. & Feldt-Caesar, N. (2019). Quality criteria for teachers to choose video tutorials for different learning situations. In L. G. Chova, A. L. Martínez, I. C. Torres (Eds.). Proceedings of EDULEARN19 Conference , pp. 3669-3674 doi:10.21125/edulearn.2019.0957

Ratnayake, I. G., Ahl, L. M., Prytz, J. & Jankvist, U. T. (2024). Mapping the landscape: A systematic review of implementation research in Nordic Studies in Mathematics Education In J. Häggström, C. Kilhamn, L. Mattsson, H. Palmer, M. Perez, K. Pettersson, A. Röj-Lindberg & A. Teledahl (Eds.). Mediating Mathematics. Proceedings of MADIF , p. 147

Ratnayake, I., Taranto, E., Bruder, R. & Mammana, M. F. (2022). Pre-service teachers' creations of mathematics learning videos In C. Fernández, S. Llinares, A. Gutiérrez, & N. Planas (Eds.). Proceedings of the 45th Conference of the International Group for the Psychology of Mathematics Education , p. 281

Pournara, C., Adler, J., Takker, S., Mwadzaangaati, L., Ratnayake, I., & Planas, N. (2022). A framework for promoting geometric reasoning: Rationale, constitutive elements and initial applications In 30th Conference of the Southern African Association for Research in Mathematics, Science and Technology Education (SAARMSTE)

Takker, S., Ratnayake, I. Adler, J. & Pournara, C. (2021). Tasks for examining secondary teachers' knowledge of basic geometry In 6th Africa Regional Congress of ICMI on Mathematical Education (AFRICME)

Ratnayake, I. (2020). Teaching algebra with digital technology: Factors influencing secondary mathematics teachers' task development and implementation In Bulletin of the Australian Mathematical Society , p. 350-352

Ratnayake, W. I. G. & Thomas, M. O. J. (2019). Supporting secondary school mathematics teacher to design digital technology algebra tasks In W. B. Daundasekera, A.A.I. Perera, W.D. Chandrasena, T.M.S.S.K.Y. Ekanayake, T.H.K.R. De Silva, S.A.K.P. De Silva, P.G.R.S. Ranasinghe & K.G.U.D. Wijesooriya (Eds.). Mathematics for a better world (Proceedings of International Conference on Mathematics and Mathematics Education - ICMME) , p. 51