This process included articulating
the mathematical goals of the lesson, discussing how to introduce the lesson, and articulating questions teachers might pose to students during the lesson.
For instance, mathematics teacher Joseph Assof's purpose for one day included
goals for content (to use our understanding
of linear functions as a foundation for
mathematical modeling with average rate
of change), language (to use familiar terms to build greater understanding
of rates
of change), and social learning (to enrich our
lesson by participating in whole - class discussions).