Common Core writing shares many similarities with writing that has been required in the past. One of the major differences in the inclusion of something called opinion writing. At the lower grades this is what this type of writing is called. At the middle school grade levels and higher, it is called argument writing.
How is opinion/argument writing different? Rather than only stating an opinion, students are expected to provide the contrasting viewpoint about a topic (this requirement is at the upper grade levels). The was included in the standards because it reflects the type of writing that is done on the SAT test and in many college level classes.
My students have been practicing all three of these types of writing. Check back soon because I will post examples of student writing and give tips for including all three in your daily instruction.