Students graph two-variable inequalities then use the shaded regions to create tangrams. They will solve eight tangram puzzles using the pieces they have made. Once they have completed each puzzle (checklist and answer keys provided), they will be challenged to create puzzles of their own for others to solve.
This activity has proven to be a terrific way of motivating students to draw accurate graphs, especially when preceded by a brief lesson of what tangrams are and how they are used. At the same time, their spatial reasoning skills are being challenged as well.
You may wish to add or substitute tangram puzzles of your own, so long as they are ones that can be solved with the same ten pieces generated from the graphs. If you wish for different pieces entirely, you may choose to modify the given inequalities. This same project may also be adapted to supplement the teaching of graphing systems of inequalities.
Important Note: When making copies of the ten inequalities along with their blank grids for graphing, keep in mind that students will be CUTTING OUT these graphs. Make sure to make ONE-SIDED copies of these particular pages for this reason. Two-sided copies of these pages will bring the project to a quick and awkward halt.
Thanks for taking interest in this activity--I hope you have as much fun with it as I have had!
Materials Needed: Card Stock, Scissors
Created by Aaron Stidham