The main factors for arranging paragraph order in a 6th grade English story are quite simple. First, the order of events matters a great deal. If an event in one paragraph causes another in the next, that's a good indication of the correct order. Second, the growth or change in characters. If a character becomes braver over the course of the story, paragraphs should show that development in a proper sequence. Also, the overall theme. Paragraphs should contribute to the development of the theme in a sequential way.
One key factor is the logical flow of events. Events should follow a sequence that makes sense. Another is the development of the plot. Paragraphs should progress the story forward. And the character's journey is also important. As the character changes or experiences things, the paragraphs should reflect that in the right order.