How our hands help us learn.
When people talk they gesture, and those gestures often reflect thoughts not expressed in their words. In this sense, gesture and the speech it accompanies can mismatch. Gesture-speech 'mismatches' are found when learners are on the verge of making progress on a task - when they are ready to learn. Moreover, mismatches provide insight into the mental processes that characterize learners when in this transitional state. Gesture is not just handwaving - it reflects how we think. However, evidence is mounting that gesture goes beyond reflecting our thoughts and can have a hand in changing those thoughts. We consider two ways in which gesture could change the course of learning: indirectly by influencing learning environments or directly by influencing learners themselves.