How many do you see? How do you see them?

What did you notice? What do you wonder?

1. In the first column of your sheet, record whether each student has an even or odd number of counters. Circle your choice. Show your thinking using drawings, numbers, or words.
2. Complete the gray column. Does adding 1 change if the number of counters is even or odd? Show your thinking using drawings, numbers, or words.
3. Complete the last column. Does adding 2 change whether the number of counters is even or odd? Show your thinking using drawings, numbers, or words.