If teacher education is to prepare novices to engage successfully in the complex work of ambitious instruction, it must somehow
prepare them to teach within the continuity of the challenging moment-by-moment interactions with students and content over
time. With Leinhardt, we would argue that teaching novices to do routines that structure teacher–student–content relationships
over time to accomplish ambitious goals could both maintain and reduce the complexity of what they need to learn to do to
carry out this work successfully. These routines would embody the regular “participation structures” that specify what teachers
and students do with one another and with the mathematical content. But teaching routines are not practiced by ambitious teachers
in a vacuum and they cannot be learned by novices in a vacuum. In Lampert’s classroom, the use of exchange routines occurred
inside of instructional activities with particular mathematical learning goals like successive approximation of the quotient
in a long division problem, charting and graphing functions, and drawing arrays to represent multi-digit multiplications.
To imagine how instructional activities using exchange routines could be designed as tools for mathematics teacher education,
we have drawn on two models from outside of mathematics education. One is a teacher education program for language teachers
in Rome and the other is a program that prepares elementary school teachers at the University of Chicago. Both programs use
instructional activities built around routines as the focus of a practice-oriented approach to teacher preparation.
KeywordsExchange routines–ambitious teaching–instructional activities–teacher preparation–deliberate practice