Algebraic thinking

In CERME12, the Thematic Working Group 3, ‘Algebraic Thinking’, continued its work from previous CERME conferences. We had a total of 27 papers and three posters with a total of 39 people in the group. Participants represented countries from Europe and other continents: Canada, Cyprus, Denmark, Finland, France, Germany, Greece, Hungary, Italy, Norway, Spain, Sweden, The Netherlands, United Kingdom, and the United States of America. The papers loosely centred around six themes. These were: Generalisation and Pattern, Structure, Equations and Variables, Theoretical, Functional Thinking, and Algebraic Thinking. We discuss each of these themes [in this paper].