Cut out the equations on the first page of this activity. Students will have an envelope filled with equations on slips of paper. With no other instructions, students will work together to sort them into team-generated categories. Groups will need to decide the properties of each category and be able to defend their choices to the class.
After a lesson on the Properties of Real Numbers, ask students to look over their categories again, and rearrange them as necessary to fit into each property. When this is complete, have students glue some examples of each property onto the Record Sheet to keep for reference or hand in for a grade.