Combine cornstarch and water. Then, have students write about the concoction.
This lesson models how to create a graphic organizer by first writing the topic sentence and then writing the ending sentence. It adds some details in the middle - complete with a simile. It also stretches the topic/beginning thoughts into a strong first paragraph.
From here, the classroom teacher finishes the writing assignment by modeling writing aloud with his/her class. There are two examples of strong 4th grade writing (complete pieces) for students to compare to a 4 (advanced writing).