I have prepared an easy to fill in PDF for my students to use at the start of our argument writing unit. It is incredibly comprehensive and allows the students the chance to improve their own writing with appropriate topic sentences and transition sentences.
Here is the most recent variation of the outline I have used this year. A veteran teacher might use this as a supplement to an existing writing unit, while a new teacher may see this as a strong outlining tool when one starts a new school without clear curriculum guidelines.
I hope you find this to be a useful resource for your middle school ELA classroom!