These posters use the acronym OREO to help students organize and remember the different steps in opinion writing. For each step, there is an example using Oreo cookies. This could be used across grade levels. I have used it with my kindergartners as well as my third graders. I start off the unit by giving each student two different cookies to try and then they have to pick their favorite and write an opinion piece. I use the visual of the Oreo cookie. The beginning and end look the same and all the delicious details are in the middle just like the cream filling.