Learning and teaching for understanding: the key role of collaborative knowledge building, (G. Wells); Social constructivist teaching and the shaping of students' knowledge and thinking, (G. Nuthall); A diversity of teaching and learning paths - teaching writing in situated activity, (C.S. Englert, K. Dunsmore); A highly interactive discourse structure, (A. Schoenfeld); Methods, goals, beliefs, commitments, and manner in teaching - dialogue against a calculus backdrop, (D. Chazan, M. Schnepp); Talking to understand science, (K.J. Roth); Constructing ideas about history in the classroom - the influence of competing forces on pedagogical decision making, (B.A. Van Sledright, J.H. James); Westward expansion and the ten-year-old mind - teaching for understanding in a diverse classroom, (C.M. Okolo et al); Discussion, (J. Brophy).