Math Lessons: From Flipped to Amalgamated, from Teacher- to Learner-Centered

We introduce a collaboration framework for teachers and teacher educators, who are interested in designing learner-centered mathematics lessons that amalgamate instructional videos. The framework is spiral, when each of its rounds consists of four phases: understanding the teaching context, developing a plan of an amalgamated lesson, carrying out the lesson and looking back. The implementation of the framework is expected to foster teachers' technological pedagogical content knowledge. To exemplify the framework in action we present a case of an experienced high-school teacher. The case highlights the complexity of designing learner-centered lessons even for a knowledgeable teacher with predispositions towards integration of technology in the classroom.