This assignment includes the format for how to write a three-paragraph business complaint letter, a sample of an actual complaint letter in modified block style, and a 100 point grading rubric for the teacher. SUGGESTED LESSON: Day 1) review the letter format, discuss the importance of expressing yourself formally when you are angry, brainstorm ideas to write about - students can write to a restaurant they've had bad service in, a defective product they've received, etc. Days 2-3) Students write and then type out their letters. Days 4-5)Students read their business complaint letters out loud in front of the class. Enjoy!