This document presents writing samples that have been annotated to illustrate the criteria required to meet the Common Core State Standards for particular types of writing--argument, informative/explanatory text, and narrative--in a given grade. Each of the samples exhibits at least the level of quality required to meet the Writing standards for that grade. The range of accomplishment within each grade reflects differences in individual development as well as in the conditions under which the student writers were expected to work. Some of the samples were written in class or as homework; others were written for on-demand assessments; still others were the result of sustained research projects. Where possible, each sample includes information about the circumstances under which it was produced. The samples come from students in kindergarten through grade 12. [For the main report, see "Common Core State Standards for English Language Arts & Literacy in History/Social Studies, Science, and Technical Subjects" (ED522008). For additional appendixes to the main report, see: (1) "Common Core State Standards for English Language Arts & Literacy in History/Social Studies, Science, and Technical Subjects. Appendix A: Research Supporting Key Elements of the Standards, Glossary of Key Terms" (ED522007); and (2) "Common Core State Standards for English Language Arts & Literacy in History/Social Studies, Science, and Technical Subjects. Appendix B: Text Exemplars and Sample Performance Tasks" (ED522010).]