This exploration of the essential knowledge offered by research on teacher planning is divided into four parts. The first part deals with the kinds of knowledge derived from research on teaching. It is noted that teacher effectiveness researchers have been primarily concerned with producing knowledge about the observable behavior of effective…

A tiered objectives model is recommended that teachers can use in mixed-ability classrooms to raise students' mathematics achievement. Guidelines for developing tiered activities include: identify objectives, create a set of activities for teaching each objective, identify the next level of increasing complexity, and group students according to…