"Fresh and clear perspectives are needed to study and interpret the complex world of teachers' and children's thinking as they communicate about and learn mathematics and science. The editors and authors of this book have succeeded in bringing together a diverse and important set of ideas that can provide these new perspectives. The use of social interaction theories appears to have promise for guiding the analysis and interpretation of the rich and complex data that arises from classroom observations, videotape studies, interviews, and similar research methods."—Mathematical Thinking and Learning