目次

Section 1: Mathematical, Epistemological, and Curricular Perspectives.-  Thinking About The Teaching Of Geometry Through The  Lens Of Geometrical  Work And Geometrical ParadigmsAlain Kuzniak Epistemological Features Of A Constructional Approach To Regular 4-PolytopesStephan Berendonk and Marc Sauerwein Geometry Opportunites For Reasoning And Proof In  Secondary School Textbooks In Trinidad And TobagoAndrew A. Hunte Enacting Functions  From Geometry To AlgebraScott Steketee and Daniel Scher Section 2: Studies of Geometry Instruction and Teacher Knowledge Examining The Work Of Teaching Geometry As A Subject-Specific PhenomenonPatricio Herbst, Nicolas Boileau, and Umut Gürsel Creating Profiles Of Geometry Teachers’ Pedagogical Content KnowledgeAgida G. Manizade and Dragana Martinovic Symbiosis Between Subject Matter And  Pedagogical Knowledge In GeometryMohan Chinnappan,  Bruce White, and Sven Trenholm Designing Instruction Towards Mathematical Literacy In Geometry: A Case StudyUi Hock Cheah Minding the Gap: A Comparison Between Pre-Service and Practicing High School Geometry Teachers’ Geometry Teaching KnowledgeShawnda Smith Some Notes On Teaching Geometry In Secondary School: A Teacher Training ExperienceAlejandra Almirón, Susana Ammann, Fernando Bifano, Rosa Ferragina, Gema Fioriti, Leonardo Lupinacci, and José Villella.  Section 3: Studies of Geometry Thinking and Learning Exploring Models Of Secondary Geometry AchievementSharon L. Senk, Denisse R. Thompson, Yi-Hsin Chen, and Kevin J. Voogt Connectedness Of Problems And Blockage Resolution In The Solving Process: A Major Educational ChallengeJosep Fortuny, Michel Gagnon, and Philippe Richard The Use Of Writing As A Metacognitive Tool In Geometry LearningLuz Graciela Orozco Vaca Development Of Spatial Ability Results From The Research Project GeodikonGuenter Maresch Middle School Students' Use Of Property Knowledge And Spatial Visualization In Reasoning About 2D RotationsMichael T. Battista and Leah M. Frazee Aspects of Spatial Thinking In Problem Solving: Focusing On Viewpoints In  Constructing Internal RepresentationMitsue Arai Engaging Students with Non-Routine Geometry Proof  TasksMichelle Cirillo Playing With Geometry: An Educational Inquiry Game  ActivityYael Luz and Carlotta Soldano Differences In Self-Reported Instructional Strategies Using A Dynamic Geometry Approach That Impact Students’ ConjecturingBrittany Webre, Shawnda Smith, and Gilbert Cuevas ConclusionThe Editors