P21 is an acronym for Partnership for 21st Century Skills (www.P21.org).  P21 is also an acronym for Pre-Kindergarten through grade 21, which defines the span of schooling grades beginning with Pre-Kindergarten, up through elementary, secondary, post-secondary, and graduate levels of education and training.  P21 provides resources, such as a P21 Common Core Tool Kit, for teaching .

Every Lesson-Up lesson plan contributes to specific skills defined in P21''s Framework for 21st Century Learning, as shown in the ePlan for each lesson.