Tasks as a Tool for Exploring the Cyclical Nature of Learning and Developing Reflection in the Teaching of Mathematics -- Function, Form and Focus: The Role of Tasks in Elementary Mathematics Teacher Education -- Using Lesson Study to Develop an Appreciation of and Competence in Task Design -- Reflecting on the Process of Task Adaptation and Extension: The Case of Computational Starters -- Tasks for Primary Student Teachers: A Task of Mathematics Teacher Educators -- The Mathematics Teaching Portfolio: A Reflective Tool for Developing Professional Growth and Improving Classroom Practices -- Tasks as a Tool for Developing Mathematical Knowledge for Teaching -- Pushing Probability and Statistics Tasks in a New Direction -- Logic in Wonderland: Alice's Adventures in Wonderland as the Context of a Course in Logic for Future Elementary Teachers -- Tasks using Video Clips of Children in a Content Mathematics Course for Future Elementary School Teachers -- Teacher Tasks for Mathematical Insight and Reorganization of What it Means to Learn Mathematics -- Teaching and Understanding Mathematical Modelling through Fermi-Problems -- A Research-Based Workshop Design for Volume Tasks -- Task-Based Lessons: The Central Focus of a Mathematics Content Course for Future Elementary Teachers -- Tasks as a Tool for Developing Knowledge through and for Practice -- The Use of Relational Games in Initial Teacher Education: Bringing the Classroom into the Lecture Theatre -- Using Mathematically Rich Tasks to Deepen the Pedagogical Content Knowledge of Primary Teachers -- From Professional Tasks in Collaborative Environments to Educational Tasks in Mathematics Teacher Education -- The Analysis of Classroom-Based Processes as a Key Task in Teacher Training for the Approach to Early Algebra -- Outdoor Mathematical Experiences: Constructivism, Connections, and Health -- From Teacher Education to Teacher Practice: A Gap Affecting the Implementation of Tasks -- Concluding Remarks.