Original sentence: Partially in response to The National Commission on Writing's challenge to American public educators "to teach all students to write effectively, clearly and thoughtfully," the National Governors Association Center for Best Practices (NGA Center) and the Council of Chief State School Officers (CCSSO) assumed in 2009 the coordination of a state-led effort called The Common Core State Standards Initiative.Standards have been organized around the following categories: Text Types and Purposes; Production and Distribution of Writing; Research to Build and Present Knowledge; and Range of Writing.These main categories are divided into 10 concepts and skills which are introduced to students in Kindergarten and then built upon in subsequent grade levels, with the intention that complexity and rigor increase each year to facilitate development and mastery,
Edited sentence: Complexity and rigor increase each year so students develop and master each concept and skill.In 2009, the National Governors Association Center for Best Practices (NGA Center) and the Council of Chief State School Officers (CCSSO) assumed the coordination of a state led effort called The Common Core State Standards Initiative.The National Commission on Writing has challenged American public educators "to teach all students to write effectively, clearly and thoughtfully.These main categories are divided into 10 concepts and skills which are introduced to students in Kindergarten and then built upon in every subsequent grade level.These standards indicate key points in English Language Arts Writing through outlining the following main categories: Text Types and Purposes; Production and Distribution of Writing; Research to Build and Present Knowledge; and Range of Writing.This effort is ongoing and is certain to have a profound effect nationwide on writing curriculum and pedagogical practice over the next decade