T.E.D.S is an acronym created by a principal in the 1990s to help students in grades 3-5 structure paragraphs for writing assessments. It stands for Topic sentences, Essential details, and Summary sentences. Topic sentences introduce the main idea at the beginning. Essential details in the middle paragraphs support the topic sentence. Summary sentences conclude the paragraph by recapping the main point. The document provides guidance on how to carefully select each element to engage readers and leave a lasting impression.