In this video, the teacher explains how to organize ideas for writing a strong opinion letter using a boxes and bullets format. The three steps are outlined: writing the reason in a box, identifying examples that support the reason, and listing those examples as bullets. The teacher emphasizes the importance of planning before writing and provides an example using a thesis statement about recess being the best part of the day. This lesson helps students effectively structure their thoughts and arguments in order to write a well-organized and persuasive letter.