Prepare students to use productive thinking. The learning activity Using Productive Thinking in Media Arts should be used to prepare students to use productive thinking.
In determining "categories" for varied ideas: As long as the student can justify his or her choices, then the category is valid.
For example, if a student lists: "grass, house plants, leaves, weeds, our couch, cooked spinach..." then there could be a category of "things inside the house" with "couch, cooked spinach, and house plants" and a category of "outside the house" with "grass, weeds, and leaves." That would be two categories. However, more productive thinking would be that there are four categories:
Living Things: grass, weeds, house plants, leaves
Non-Living Things: couch, cooked spinach
Inside Things: couch, cooked spinach, house plants
Outside Things: grass, weeds, leaves
Find and save a commercial of a high-interest product in a format that can be shared with the class, such as an MP4, online video link, etc.