Microteaching Lesson Study [MLS] combines elements of Japanese lesson study and microteaching. A case study of MLS was conducted with 18 prospective teachers in an initial course on learning to teach. Active learning involving meaningful discussion, planning, and practice, support from a knowledgeable advisor, collaborative deliberation-in-process, and opportunity to trial, analyse and revise were aspects of MLS revealed as centrally important for prospective teacher learning through MLS.