The Great Number Hunt (Unsorted)

Steps

1. Ask how you would find a book on a shelf if the books are in no order.
2. Put children in pairs, back to back. Each has a sheet of 31 boxes.
3. One partner picks a number that the other must find by guessing boxes one at a time.
4. Count how many guesses it takes. Write it on the class chart or spreadsheet.
5. Swap roles and play again.
6. Look at the chart together. What do you notice?

Talk about it

• What is the fewest guesses? The most?
• Is there a smarter way to guess?
• What would help?