1. Click on to get started. 2. Look carefully at each number, symbol, or image. 3. Then decide which image one you think doesn't belong in the group. 4. Share your answer using the and , and be sure to defend your answer with some math reasoning. If you want to challenge yourself, come up with another answer that is different. 5. Don't forget to click the when you are finished. I look forward to hearing your thinking.