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, dearaujoz@missouri.edu, is an assistant professor of mathematics education at the University of Missouri in Columbia. Her research examines teachers' use of curriculum.