I’m Thinking of a Number

I’m Thinking of a Number is a Grade 2 whole-class number-sense game for reasoning with numbers from 1 to 100. The teacher chooses a secret number and students narrow the possibilities with yes-or-no questions about properties such as odd or even, greater than or less than a benchmark, or whether a certain digit appears. Direct guesses are off limits, so good questions matter more than luck.

Use it as a warm-up when you want students using place value, comparison, and number properties in conversation. A hundreds-style chart can help students eliminate possibilities and see which questions are most efficient. Create a free Find a Math Game account to generate teacher-ready lesson support for I’m Thinking of a Number. No credit card is needed, with 3 lesson generations for life.