The text books utilize middle school curricular materials in multiple ways

 
As a springboard to college level mathematics

To expose future (or present) teachers to current middle grade curricular materials

To provide strong motivation to learn more and better mathematics

To support curriculum dissection—critically analyzing middle school curriculum content—developing improved middle grade lessons through lesson study approach

To use college content to gain new perspectives on middle grade content and vice versa

To apply middle grade instructional strategies and multiple forms of assessment to the college classroom