Teachers, save “I'm Thinking Of A Number” to assign it to your class.

Choose a number and mark it on your board. Try to guess your partner's number by eliminating numbers on their board. Ask questions like: "Is it a _____________ number?" with "yes" or "no" answers. Mark out the numbers you have eliminated. Take turns allowing your partner to ask questions about your number. Only answer questions with "yes" or "no". The first person to find the secret number wins.