The Guess My Number game gets students out of their seats as they engage in questioning and numerical reasoning while using academic language. To begin, each student writes a secret number on a sticky note and tapes it onto another student's back. Students then meet with others in the classroom. For each meeting, they show one another the numbers on their backs and then ask one yes-no question to try to determine their number.
Zandra de Araujo, firstname.lastname@example.org, is an assistant professor of mathematics education at the University of Missouri in Columbia. Her research examines teachers' use of curriculum.
William DeLeeuw, email@example.com, is an assistant professor of mathematics education at Arizona State University. He enjoys helping future elementary school teachers understand mathematics and investigating how students who have been unsuccessful in mathematics can find success. Edited by Theodore Chao, firstname.lastname@example.org, an assistant professor of mathematics education at Ohio State University in Columbus; and Imani Goffney, email@example.com, an assistant professor at the University of Houston. Submit your quick game, puzzle, activity, or instructional strategy along with suggestions for how teachers of different grade bands (K–1, 2–3, 4–6) can use this idea. Access http://tcm.msubmit.net to send submissions of no more than 250 words to this department. Go to http://www.nctm.org/WriteForTCM for detailed submission guidelines for all departments.