"Based on the premise that every learner is somewhere on a path toward expertise in a content area, this resource promotes a curriculum model for developing the abilities of all students and extending the abilities of students who perform at advanced levels." "The Parallel Curriculum Model (PCM) offers four curriculum parallels that incorporate the element of Ascending Intellectual Demand to help teachers determine current student performance levels and develop intellectual challenges to move learners along a continuum toward expertise."--BOOK JACKET.