PhD (Mathematics) University of Toronto
MSc (Mathematics) University of Toronto
BSc (Mathematics/Physics) University of Toronto
PCEd (Secondary Mathematics with Distinction) The University of Hong Kong
Academic & Professional Experience
Jan 2011 – Present  Associate Professor, Dept of Education Studies, Hong Kong Baptist University 
Jan 2009 – Dec 2010  Assistant Professor, Dept of Mathematics and Information Technology, The Hong Kong Institute of Education 
Sep 2000 – Dec 2008  Assistant Professor, Faculty of Education, The University of Hong Kong 
Sep 1999 – Aug 2001  Teaching Consultant, Faculty of Education, The University of Hong Kong 
Honorary Appointment
Jan 2011 – 2014  Honorary Associate Professor, Faculty of Education, The University of Hong Kong 
Jan 2009 – 2010  Honorary Assistant Professor, Faculty of Education, The University of Hong Kong 
Research Interests
 Learning and teaching of mathematics in toolbased environments (in particular ICT and dynamic geometry)
 STEM Education
 Mathematics task design
 Applications and development of the Theory of Variation in teaching and learning
 Lesson and Learning Studies
Doctoral Supervision
PhD Supervision (Hong Kong Baptist University)
Lei Ka Hio (thesis submitted) Thesis Title: Didactical interactions in toolbased mathematical lessons
Chung, Kin Pong (thesis submitted) Thesis Title: Teachers’ perception on illposed mathematical problems: Implications on task design for implementation of formative assessment
PhD Supervision (The University of Hong Kong)
Chik, Pui Man Pakey (graduated 2006) Thesis title: Differences in learning as a function of differences between hierarchical and sequential organization of the content taught
Chan, Yip Cheung (graduated 2009) Thesis title: Experimentaltheoretical interplay in dynamic geometry environments
Lee, Arthur Man Sang (graduated in 2015) Thesis title: Developing a dynamic geometry task platform for accessing students’ perceptions of geometric properties through analysis of example spaces
EdD Supervision (The University of Hong Kong)
Lam, Eva (graduated in 2012) Thesis title: The use of metaphor in mathematics lessons
Cheng, Wing Kin (graduated in 2015) Thesis title: Junior secondary students’ schemata on a line reflection construction task
Publications
Book, Book Chapters and Monograph
 Leung, A. & BaccagliniFrank, A. (Eds.) (2017). Digital Technologies in Designing Mathematics Education Tasks – Potential and Pitfalls (Mathematics Education in the Digital Era Book Series). Berlin: Springer.
 Leung, A., & Hung, S. (2018). Mathematising basic addition. In Virginia Kinnear, MunYee Lai and Tracey Muir (Eds.) Forging Connections in Early Mathematics Teaching and Learning (pp. 139154). Berlin: Springer.
 Leung, A. (2017). Variation in toolbased mathematics pedagogy: the case of dynamic virtual tool. In R. Huang & Y. Li (Eds.), Teaching and Learning Mathematics through Variation – Confucian Heritage Meets Western Theories (pp.6984). Rotterdam, Sense Publishers.
 Leung, A. (2017). Exploring technopedagogic task design in the mathematics classroom. In Allen Leung, & Anna BaccagliniFrank (Eds.). Digital Technologies in Designing Mathematics Education Tasks – Potential and Pitfalls (Mathematics Education in the Digital Era Book Series) (pp.316). Berlin: Springer.
 Chan Y.C., Leung, A. & Ong, M.Y. (2017). Feedbacks and discrepancies of a physical toolkit and a digital toolkit: opportunities and pitfalls for mediating the concept of rotational symmetry. In Allen Leung, & Anna BaccagliniFrank (Eds.). Digital Technologies in Designing Mathematics Education Tasks – Potential and Pitfalls (Mathematics Education in the Digital Era Book Series) (pp.259283). Berlin: Springer.
 BaccagliniFrank, A., Antonini, S., Leung, A., &, Mariotti, M.A. (2017). Designing nonconstructability tasks in a dynamic geometry environment. In Allen Leung, & Anna BaccagliniFrank (Eds.). Digital Technologies in Designing Mathematics Education Tasks – Potential and Pitfalls (Mathematics Education in the Digital Era Book Series) (pp.99120). Berlin: Springer.
 Leung, A. & BoliteFrant, J. (2015). Designing Mathematics Tasks: The Role of Tools. In Anne Watson and Minoru Ohtani (Eds.). Task Design in Mathematics Education: The 22nd ICMI Study (New ICMI Study Series) (pp. 191225). New York: Springer.
 Leung, A. (2015). Discernment and reasoning in dynamic geometry environments. In Sung Je Cho (Ed.) Selected Regular Lectures from the 12th International Congress on Mathematical Education (pp. 451470). New York: Springer.
 Roberts, D., Leung, A. & Lin, B. (2013). From the slate to the web: Technology in the mathematics curriculum. In Alan Bishop, Ken Clement, Christine Keitel, Jeremy Kilpatrick and Frederick Leung (Eds.) Third International Handbook of Mathematics Education (pp. 525547). Berlin: Springer.
 Arzarello, F., BartoliniBussi, M., Leung, A., Mariotti, M.A. & Stevenson, I. (2012). Experimental approach to theoretical thinking: Artefacts and proofs. In Gila Hanna and Michael de Villers (Eds.) Proof and Proving in Mathematics Education: The19th ICMI Study (New ICMI Study Series)(pp. 97137). Berlin: Springer.
 梁玉麟、勞傅燕華、江巧妍編 (2012)。《數學課堂學習研究實踐與數學基本概念的教學》香港課堂學習研究叢書之六。安徽教育出版社。
 梁玉麟、梁志強 (2012) 。〈從方程中變量的比例關系初探變易理論的課堂實踐〉。載梁玉麟、勞傅燕華、江巧妍（編），《數學課堂學習研究實踐與數學基本概念的教學》香港課堂學習研究叢書之六（頁150184）。安徽教育出版社。
 梁玉麟 (2012) 。〈變易理論對數學“教” 與“學” 的啟迪〉。載梁玉麟、勞傅燕華、江巧妍（編），《數學課堂學習研究實踐與數學基本概念的教學》香港課堂學習研究叢書之六（頁185209）。安徽教育出版社。
 Chik, P.M., Leung, A. & Marton, F. (2010). Learning words. In Marton, F., Tse, S.K. & Cheung, W.M. (Eds.) On the learning of Chinese (pp. 103122). SENSE Publisher.
 Leung, F.K.S., Lee, A.M.S., Leung, A.Y.L., Mok, I.A.C. & Wong, K.L. (2010). What can we teach mathematics teachers? Lessons from Hong Kong. In, Leung, F.K.S. & Li, Y. (Eds), Reforms and Issues in School Mathematics in East Asia (pp. 153167). SENSE Publication.
 Julie, C., Leung, A., Nguyen, C.T., Posadas, L., Sacristán, A. I. and Semenov, A. (2009). Some Regional Developments in ICT: Access and Implementation. In, Celia Hoyles and JeanBaptiste Lagrange (Eds.) Mathematics Education and Technology – Rethinking the Terrain: The 17th ICMI Study (New ICMI Study Series) (pp. 361383). Berlin: Springer.
 (Monograph) 黃毅英，梁玉麟，鄧國俊，陳詠心 (2009). 《香港數學教育專業知識基礎的集體追求》，香港，香港數學教育學會。
 Leung Y.L. (2005). Variation in Dynamic Geometry Environment (互動幾何環境中的變易). In, Ki, W.W., Tse, S.K. & Shum, M.S.K. (Eds.),Variation Theory and the Space of Learning (變易理論與學習空間), Hong Kong University Press, 125139 (in Chinese).
 Lo, M.L., Chik P.M., Ko, P.Y., Leung, Y.L., Pong, W.Y., LoFu, Y.W. & Ng, F.P. (2005) Learning Studies: Development and Impact. In, Lo, M.L., Pong, W.Y. & Chik, P.M. (Eds.), For Each and Everyone: Catering for Individual Differences through Learning Studies (pp.4173). Hong Kong: Hong Kong University Press.
 Leung, A. (2002). P.4 Mathematics lesson on ‘area and perimeter’. In, Lo, M.L., Pong, W.Y., Marton, F., Leung, A., Ko, P.K., Ng, F.P., Pang, M.F., Chik, P.M.P., Chan, S.S.F. & Tang, N.C.A. Catering for Individual Differences, Building on Variation: the first findings (pp.2839). Hong Kong, INSTEP, Faculty of Education, The University of Hong Kong.
 Leung, A. & LopezReal, F. (2000). An analysis of students’ explorations and constructions using Cabri geometry. In, Clements, M.A., Tairab, H., & Yoong, W.K. (Eds.), Science, Mathematics and Technical Education in the 20th and 21st Centuries. Universiti Brunei Darussalam, pp. 144154.
Refereed International Journal and International Conference Papers
 BaccagliniFrank, Antonini, S., A., Leung, A., & Mariotti, M.A. (in press). Dynamic explorations that can help make sense of proof by contradiction. Digital Experiences in Mathematics Education.
 Lei, H. & Leung, A. (2017). Toolbased mathematics lesson: A case study in transitions of activities in didactical cycle. IN Kaur, B., Ho, W.K., Toh, T.L. & Choy, B.H. (Eds.). Proceedings of the 41st Conference of the International Group for Psychology of Mathematics Education, Vol. 3, pp. 145152. Singapore: National Institute of Education.
 Leung, I. K. C., Ding, L., Leung, A. Y. L., & Wong, N. Y. (2016). The Correlation between Prospective Teachers’ Knowledge of Algebraic Inverse Operations and Teaching Competency–using the square root as an example. International Journal for Mathematics Teaching and Learning, 17(3).
 Sinclair, N., Bartolini Bussi, M. G., de Villiers, M., Jones, K., Kortenkamp, U., Leung, A., & Owens, K. (2016). Recent research on geometry education: an ICME13 survey team report, ZDM – The International Journal on Mathematics Education, 43, 325336. [SCImage Journal & Country: Rank Q1 under Mathematics, H Index 18; Rank A in ERA List]
 Sivan, A., Tam, V. C., Hu, A., Chan, D. W. K., Leung, A. Y. L., Chaudhuri, T., Chow, B. C., Hung, S. S. L., Kim, L. E., Mah, D. N. Y., Shroff, R., & Wong, O. M. H. (2016). Designing and implementing a twolevel community of practice project to develop a teaching portfolio framework. Learning Communities Journal 8(2), 5169.
 Leung, A. (2015). Designing toolbased task in the teaching of school mathematics, Journal for CrossDisciplinary Subjects in Education. IJCDSE, Special Issue ,Volume 5, Issue 1, pp. 24582462.
 Leung, A. (2015). An explorative study on designing toolbased task in the teaching of school mathematics. In Charlies A. Shoniregun & Galyna A. Akmayeva (Eds.) Canadian International Conference on Education (CICE2015) Proceedings, pp.111114, Toronto, Canada.
 Cheng, K. & Leung, A., (2015). A dynamic applet for the exploration of the concept of the limit of a sequence. International Journal of Mathematics Education in Science and Technology, 46:2, 187204
 Leung, A. (2014). Principles of acquiring invariant in mathematics task design: a dynamic geometry example. In Peter Liljedahl, Cymthia Nical, Susan Oesterle & Darien Allan (Eds.) Proceedings of the 38^{th} Conference the International Group for the Psychology of Education and the 36th Conference of the North American Chapter of the Psychology of Mathematics Education, 4, pp. 8996, Vancouver, Canada.
 Leung, K.C., Ding, L., Leung, A.Y.L., & Wong, N.Y.Leung, A. (2014). How the knowledge of algebraic opration relates to prospective teachers’ teaching competency: an example of teaching the topic of square root. In Peter Liljedahl, Cymthia Nical, Susan Oesterle & Darien Allan (Eds.) Proceedings of the 38th Conference the International Group for the Psychology of Education and the 36th Conference of the North American Chapter of the Psychology of Mathematics Education, 4, pp. 97103, Vancouver, Canada.
 Leung, K.C., Ding, L., Leung, A.Y.L., & Wong, N.Y. (2014). Prospective teachers’ competency in teaching how to compare geometric figures: The concept of congruent triangles as an example. In Hwang, H.J, SangGu, L. and Choe, Y.H. (Eds)., Proceedings of the Korean Society of Mathematical Education 2014 Spring Conference on Mathematical Education (pp. 545558). Seoul, Korea.
 Chan, Y. C. & Leung, A. (2013). Rotational symmetry: semiotic potential of a transparency toolkit. In C. Margolinas (Ed.). Proceedings of the ICMI 22 Study Conference: Task Design in Mathematics Education, 1, pp. 3745, Oxford, UK.
 Leung, A. & BaccagliniFrank, A. & Mariotti, M. A. (2013). Discernment of invariants in dynamic geometry environments. Educational Studies in Mathematics, 84:439460.
 Leung, A. & Lee, A.M.S. (2013). Students’ Geometrical Perception on a Taskbased Dynamic Geometry Platform. Educational Studies in Mathematics, 82:361–377.
 BaccagliniFrank, A., Antonini, S., Leung, A., & Mariotti, M.A. (2013). Reasoning by contradiction in dynamic geometry. PNA, 7(2), 6373.[http://hdl.handle.net/10481/22368]
 Man, Y. K. & Leung, A. Y. L. (2012). Teaching a new method of partial fraction decomposition to senior secondary students: Results and analysis from a pilot study. International Journal for Mathematics Teaching and Learning [eJournal]. Retrieved April 20, 2012, fromhttp://www.cimt.plymouth.ac.uk/journal/man.pdf
 Leung, A. (2012). Variation and mathematics pedagogy. In J. Dindyal, L. P. Cheng & S. F. Ng (Eds.), Mathematics education: Expanding horizons, (Proceedings of the 35th annual conference of the Mathematics Education Research Group of Australasia, Vol. 2, pp. 435442). Singapore: MERGA, Inc.
 Lee, A.M.S. & Leung, A. (2012). Students’ understanding of geometric properties experienced in dynamic geometry environment. In Tso, T. Y. (Ed.) Proceedings of the 36th Conference of the International Group for the Psychology of Mathematics Education, Vol. 3, pp. 5966. Taipei, Taiwan: PME.
 Man, Y. K. & Leung, A. Y. L. (2012). Teaching a new method of partial fraction decomposition to senior secondary students: Results and analysis from a pilot study, International Journal for Mathematics Teaching and Learning [eJournal]. Retrieved April 20, 2012, fromhttp://www.cimt.plymouth.ac.uk/journal/man.pdf
 Leung, A. (2011). An epistemic model of task design in dynamic geometry environment. ZDM – The International Journal on Mathematics Education, 43:325336.
 BaccagliniFrank, A., Antonini, S., Leung, A., & Mariotti, M.A. (2011). Reasoning by contradiction in dynamic geometry. In Ubuz, B. (Ed.). Proceedings of the 35th Conference of the International Group for the Psychology of Mathematics Education , Vol. 2, 8188. Ankara, Turkey. PME.
 Leung, A. (2010). Empowering learning with rich mathematical experience: reflections on a primary lesson on area and perimeter,International Journal for Mathematics Teaching and Learning [eJournal]. Retrieved April 1, 2010, fromhttp://www.cimt.plymouth.ac.uk/journal/leung.pdf
 Wong, N.Y., Leung, A., Tang, K.C. & Chan, W.S. (2009). Research in mathematics education in the past twentyfive years. Educational Research Journal, 24(1), 4170.
 Leung, A. (2009). Written proof in dynamic geometry environment: inspiration from a student’s work. Proceedings of the ICMI 19 Study Conference: Proof and Proving in Mathematics Education, 2, 1520, Taipei, Taiwan.
 Leung, A. (2008). Dragging in a dynamic geometry environment through the lens of variation. International Journal of Computers for Mathematical Learning, 13:135157.
 Leung, A. & Or, C.M. (2007). From construction to proof: explanations in dynamic geometry environment. Proceedings of PME 31: Psychology of Mathematics Education 31th International Conference, July, 2007, Seoul, Korea.
 Leung, A & Chan, Y.C. (2006). Exploring necessary and sufficient conditions in dynamic geometry environment. International Journal for Technology in Mathematics Education, 13(1), 3744.
 Leung, A., Chan, Y.C, & LopezReal, F. (2006). Instrumental genesis in dynamic geometry environments. Proceedings of the ICMI 17 Study Conference: Technology Revisited, Part 2, 346353, Hanoi, Vietnam.
 Lee, A., Wong, K.L. & Leung, A. (2006). Developing learning and assessment tasks in a dynamic geometry environment. Proceedings of the ICMI 17 Study Conference: Technology Revisited, Part 2, 33434, Hanoi, Vietnam.
 LopezReal, F. & Leung, A. (2006). Dragging as a conceptual tool in dynamic geometry, International Journal of Mathematical Education in Science and Technology, 37(6), 665679
 Leung, A. & Chan, Y.C. (2005). Exploring necessary and sufficient conditions in dynamic geometry environment. Proceedings of the 7th International Conference on Technology in Mathematics Teaching, 1, 117124. Bristol, UK.
 Leung, A. & Chan, K. W. (2004). Visual reasoning in computational environment: a case of graph sketching. Proceedings of PME 28: Psychology of Mathematics Education 28th International Conference, 3, 233240. Bergen, Norway.
 Leung, A. (2003). Dynamic geometry and the theory of variation. Proceedings of PME 27: Psychology of Mathematics Education 27th International Conference, 3, 197204. Honolulu, USA.
 Leung, A. & LopezReal, F. (2003). Properties of tangential and cyclic polygons: an application of circulant matrices. International Journal of Mathematical Education in Science and Technology, 34(6), 859 870.
 Leung, A. & LopezReal, F. (2002). Theorem justification and acquisition in dynamic geometry: A case of proof by contradiction. International Journal of Computers for Mathematical Learning, 7, 145165
 LopezReal, F. & Leung, A. (2001). Reflections on a TIMSS Geometry Lesson. For the Learning of Mathematics: A International Journal of Mathematics Education, 21(3), 2531.
 Leung, A. Y. & Vanstone, J.R. (1993). An integral formula in differential geometry via mixed exterior algebra. Manuscripta Mathematica, 78, 6983.
Others
 Leung, A. (2012). Toolbased pedagogy for school mathematics: A research proposal. EduMath, 33, 1220.
 Cheng, K., Ho, A. & Leung, A. (2011). Teaching the rigorous concept of limit. In Wong K.L., Lee Y.K. & Poon W.H. (Eds.), Proceedings of the Hong Kong Mathematics Education Conference 2011 (pp. 129136). HKAM publication.
 Ong, D. & Leung, A. (2011). Integrating students’ work in the teaching and learning of symbols and algebraic expression in a primary five classroom. In Wong K.L., Lee Y.K. & Poon W.H.(Eds.), Proceedings of the Hong Kong Mathematics Education Conference 2011 (pp. 100114). HKAM publication.
 Leung, A. (2000) A scheme on the process of knowledge growth. Curriculum Forum, 10(1), 1624. Hong Kong, Department of Curriculum Studies, The University of Hong Kong.
 LopezReal, F. & Leung, A. (2000). Students’ perceptions of computer versus noncomputer environments in the study of geometry.Curriculum Forum, 9(2), 4559. Department of Curriculum Studies, The University of Hong Kong.
Consultancy Reports
 Lo, M. L., Pong, W. Y., Chik, P.M.P., Ko, P. Y., Leung, Y.L., Lo, Y.W., Marton, F., Ng, F. P. & Pang, M.F. (2003). Final Report: Catering for Individual Differences–Building on Variation, a Research Project Commissioned by the Curriculum Development Institute, Hong Kong: Hong Kong Government.
 Lo, M. L., Pong, W. Y., Marton, F., Ko, P. Y., Leung, Y. L. A., Ng, F. P. D., Pang, M.F., Chik, P. M. P., Chan, S. S. F., & Tang, N. C. A. (2002). Catering for Individual Differences – Building on Variation 2nd Annual Report 20012002. Hong Kong: Curriculum Development Institute, Education Department.
International Scholarly Activities

Invited to be a key speaker on the Future of Mathematics Education for ICME 13 Topic Study Group 42 on Uses of Technology in Lower Secondary Mathematics Education (age 10 to 14) to be held in July 2016, Hamburg, Germany.
 Member of the survey team Geometry (including new technologies) at ICME13 (13^{th} Congress of Mathematics Education), Germany, 2016

Member of the International Programme Committee for the 22nd ICMI (International Congress of Mathematics Instruction) Study Conference on Task Design in Mathematics Education, July 2013, Oxford, UK

Programme Cochair for the WALS09 (World Association of Lesson Study 2009) International Conference, December 710, 2009, Hong Kong Institute of Education, Hong Kong SAR

Member of the organizing team for Topic Study Group 22: Technology in the Teaching and Learning of Mathematics for the 11th International Congress on Mathematics Education, July 613, 2008, Monterrey, Mexico

Plenary panel member of the plenary session Reflections on the use of technologies in mathematics from a regional perspective, 17th ICMI Study Technology Revisited, December 38, 2006, Hanoi University of Technology, Vietnam

Member of the Local Organization Committee for the ICMI Comparative Study Conference, October 2125, 2002, The University of Hong Kong
Research Projects
Ongoing
 Principal Investigator An Explorative Study on Designing Toolbased Task in the Teaching of School Mathematics GRF (HK$721,500) for the period of January 1, 2015 to June 30, 2018
Completed
 Principal Investigator A Pilot Study to Explore a Toolbased Teaching Approach for School Mathematics HKBU FRGI (HK$50,000) for the period of January 1, 2014 to December 31, 2014
 Coordinator (with Principal Coordinator: Prof Atara Sivan HKBU) Development of Teaching Portfolio Framework through a Multidisciplinary Community of Practice Hong Kong Baptist University StartUp Funding for the Establishment of Communities of Practice in the 20122015 Triennium (HK$ 500,000) from January 2014 to June 2015
 Coinvestigator (P.I.: Dr Issic Leung HKIEd) Knowledge competency among Hong Kong preservice mathematics teachers: in the context of New Senior Secondary school curriculum General Research Fund (HK$ 460,130) for 24 months from January 2013
 Codirector (Director: Dr Po Yuk Ko HKIEd) Problemoriented learning improvement in Mathematics QEF (HK$1,659,940) for the period of September 2103 to July 2015
 CoInvestigator (with Dr M L Lo, Dr W Y Pong, Prof Ference Marton and Dr M F Pang) Catering for Individual Differences (CID): Building on Variation Project commissioned by Curriculum Development Institute for the period of September 2000 to August 2003; (HK$4.5 million).
 Project Consultant (P.I: Po Yuk Ko HKIEd) Teaching Analysis and Lesson Observation Network (TALON) QEF, Centre of Learning Study, The Hong Kong Institute of Education, for 3 years from January 2011
 Project Consultant (P.I.: Ka Lok Wong HKU) Geometry in Clicks and Drags: a Webbased Platform for Students and Teachers A project funded by Education Bureau, Hong Kong SAR Government (HK$ 243,900) for 1 year from February 2007.
Invited Lectures, International Conference and Symposium Presentations

Research Based Attempts for Scaling Up of Technologybaes Formative Assessment Invited plenary lecture in the Digital Formative Assessment International Seminar hosted by Mathematics Education Research and Innovation Center, Faculty of Education, University of Haifa, January 10, 2018, Haifa, Israel
 Geometry Education (including New Technologies) Invited panel member for a survey team at ICME13 (13th Congress of Mathematics Education), July 2431, 2016, Hamburg, Germany

Teaching and Learning Mathematics in a Dynamic Virtual Environment Invited lecture to local Macau school teachers at the 23^{rd} International Commission on Mathematics Instruction Study Conference: Primary Mathematics Study on Whole Numbers, June 37, 2015, Macau, China

Examples as Variation Invited Reaction to the Plenary Lecture Thinking with and through Examples by Orit Zaslavsky at the 38th Conference the International Group for the Psychology of Education and the 36th Conference of the North American Chapter of the Psychology of Mathematics Education, Vancouver, Canada, July 1520, 2014

Principles of acquiring invariant in mathematics task design: a dynamic geometry example Research Report at the 38th Conference the International Group for the Psychology of Education and the 36th Conference of the North American Chapter of the Psychology of Mathematics Education, Vancouver, Canada, July 1520, 2014

How the Knowledge of Algebraic Operation Relates to Prospective Teachers’ Teaching Competency: An Example of Teaching the Topic of Square Root Research Report presented at the 38th Conference the International Group for the Psychology of Education and the 36th Conference of the North American Chapter of the Psychology of Mathematics Education Vancouver, Canada, July 1520, 2014

Thoughts on variation and mathematics task design Plenary Panel presentation at the ICMI 22 Study Conference: Task Design in Mathematics Education. Oxford, UK, July 2013.

Rotational symmetry: semiotic potential of a transparency toolkit Paper presented at the ICMI 22 Study Conference: Task Design in Mathematics Education. Oxford, UK, July 2013.

Discernment and Reasoning in Dynamic Geometry Environments Invited lecture presented at the12th International Congress on Mathematics Education, July 8th to 15th, 2012, Seoul, Korea.

Students’ understanding of geometric properties experienced in dynamic geometry environment Research Report presented at the 36th Conference of the International Group for the Psychology of Mathematics Education, July 1822, 2012, Taipei, Taiwan.

Student generated examples as a pedagogical tool: The case of algebra expression Short Oral Communication presented at the 36th Conference of the International Group for the Psychology of Mathematics Education, July 1822, 2012, Taipei, Taiwan.

Variation and mathematics pedagogy Research Report presented at the 35th annual conference of the Mathematics Education Research Group of Australasia (MERGA), 26 July, 2012, National Institute of Education, Nanyang Technological University, Singapore.

Reasoning by contradiction in dynamic geometry Research Report presented at the 5th Conference of the International Group for the Psychology of Mathematics Education. Ankara, Turkey, July1015, 2011.

Unfolding patterns of variation in a dynamic geometry exploration episode Presentation at “A Day on Variation Theory in Oxford”. Dept of Education, Oxford University, UK, February 15, 2010.

A mathematics lesson study on fraction division in a Hong Kong primary school Case Sharing presentation at the WALS09 (World Association of Lesson Study 2009) International Conference. Hong Kong. December 2009.

Cognitive apprehension in Cabri 3D environment Short Oral presentation at PME33: Psychology of Mathematics Education 33rd International Conference. Thessaloniki, Greece. July 2009.

Written proof in dynamic geometry environment: inspiration from a student’s work Paper presented at the ICMI 19 Study Conference: Proof and Proving in Mathematics Education. Taipei, Taiwan. May 2009.

Designing Teaching Units of 3D Geometry using Cabri 3D for Hong Kong Math Curriculum Paper presented at the Topic Study Group 22: Research and development in task design and analysis, ICME 11. Monterrey, Mexico, July 2008.

Variational Tasks in Dynamic Geometry Environment Paper presented at the Topic Study Group 34: Research and development in task design and analysis, ICME 11. Monterrey, Mexico, July 2008.

From construction to proof: explanations in dynamic geometry environment. Research Report presented at the Psychology of Mathematics Education 31th International Conference to be held at Seoul, Korea, July 2007.

Instrumental genesis in dynamic geometry environments Paper presented at the ICMI 17 Study Conference: Technology Revisited. Hanoi, Vietnam, December 2006.

Developing learning and assessment tasks in a dynamic geometry environment Paper presented at the ICMI 17 Study Conference: Technology Revisited. Hanoi, Vietnam, December 2006.

Exploring necessary and sufficient conditions in dynamic geometry environment Paper presented at the 7th International Conference on Technology in Mathematics Teaching. Bristol, UK, July 2005.

The conceptual tools of Euclidean and dynamic geometry environments Paper presented at the Topic Study Group 10: Research and development in the teaching and learning of geometry, ICME 10. Copenhagen, Demark, July 2004.

Visual reasoning in computational environment: a case of graph sketching Research Report presented at the Psychology of Mathematics Education 28th International Conference held at Bergen, Norway, July 2004.

Dynamic geometry and the theory of variation Research Report presentation at the Psychology of Mathematics Education 27th International Conference hosted by University of Hawaii. Honolulu, USA, July 2003.

An analysis of students’ explorations and constructions using Cabri geometry Paper presented at the Fifth Annual International Conference: Science, Mathematics and Technical Education in the 20th and 21st Centuries. Universiti Brunei Darussalam, Brunei, May 2000.
Editorial Responsibilities
 Member of the Editorial Board for the book series Mathematics Education in the Digital Era Publisher: Springer
 Member of the Editorial Board for the journal Digital Experiences in Mathematics Education Publisher: Springer.
 Member of the International Advisory Board of the book series Advances in Teaching and Teacher Education (Sense Publishers)
 Member of the Editorial Board for Mathematics Education Research Journal Publisher: Springer
 Review Editor for STEM Education of Frontiers
 Guest reviewer for International Journals: Educational Studies in Mathematics; International Journal of Science and Mathematics Education; Mathematics Education Research Journal; Journal of Research in Mathematics Education; International Journal for Technology in Mathematics Education; Technology, Knowledge and Learning; Pythagoras; , International Journal of STEM Education; International Journal of Evaluation and Research in Education
 Guest reviewer for Local Journals: Asia Pacific Education Review; Journal of Basic Education; New Horizon in Education
 Reviewer of research reports for the Annual Psychology of Mathematics Education International Conferences.
 Chief Editor of EduMath (20072010), an official publication of the Hong Kong Association for Mathematics Education.
Community Services
 Member of the Assessment Panel (AP) on Mathematics Education Key Learning Area (MEKLA) of CEATE (2015/2016)
 Member of Assessment Working Group of the Chief Executive’s Award for Teaching Excellence (2015/2016)
 Member of Committee on Professional Development of Teachers and Principals (COTAP)
 Member of Steering Committee on TIMSS 2015 in Hong Kong
 Member in CDCHKEAA Committee on Mathematics Education
 Organized a summer GeoGebra Course for The Hong Kong Academy for Gifted Education, August 4 to August 16, 2014
 Mathematics Consultant to Wong Kam Fai HKBU Affliated Primary School (since 2013)
 Mathematics Consultant to Yin Wa Primary School (June 2014 to present)
 Mathematics Lesson Study and ICT Consultant for St Edward Catholic Primary School (2003 to 2014)
 Member in CDCHKEAA Committee on Mathematics Education (since 2013)
 Cochairperson of the GeoGebra Institute of Hong Kong founded in 2012
 Committee member of EDB Mathematics Project and Book Report Competition (since 2010)
 Delivered an invited talk titled Learning Technologies and Current Mathematics Educational Research for the English School Foundation Mathematics Teacher Continuous Professional Development Day, Sha Tin College, 30 September 2011
 Conducted a workshop titled Mathematics Problem Solving through the Use of Tools for St Edward’s Catholic Primary School Mathematics Teacher Continuous Professional Development Day, 30 September, 2011
 Invited speaker for a workshop on Using Technology for Mathematical Investigation for the English School Foundation teachers, May 5, 2011 and June 18, 2010