Have your students sit quietly at their desks with their eyes closed. Ask them to quiet their minds and listen very carefully to what is going on around them. Then set a timer for one minute. They may hear the tick of a clock or the hum of a computer, the sound of their own breath entering and leaving their body or birds chirping outside the classroom. Encourage them to try and keep thoughts from interrupting their listening. When time is up, ask students to notice what their bodies and minds feel like compared to before the activity.