This is a great tool for organizing your writing. I have used this with 3rd grade but it could be used among multiple levels. It is great for planning out a paragraph. I typically have them write a completed topic sentence in the top of the I. Then 3 bullet points with supporting details. Then a completed closing sentence.
For PA 5th graders they need to write a 5 paragraph essay for PSSA's. They could plan using the I with an opening paragraph idea, 3 bullets of supporting details/topics for 3 paragraphs. Then a closing paragraph idea.