In the FlexBook Platform® 2.0, we have deconstructed our old FlexBooks into small lessons on a specific topic. These mini-lessons are what we are now calling concepts. On our old system, the breakdown went from FlexBooks to chapters. We have taken that process a step further and broken chapters into concepts. We believe this greater granularity will make it easier for teachers to find and curate the necessary content they need to organize and deliver their lesson and for students to seek and focus on the specific topics necessary to progress through a subject.