Abstract: Gesture is widely used in people’s daily communication, adding additional information to the verbal language. It can also be used in language teaching. Scientists began to explore the role of gesture in SLA since the last century. Gesture and speech are in an integrated language system sharing the same communication system. In communication, people tend to use gesture as a communication strategy when their words are not available, especially in L2 communication. L2 learners at high schools do not have sufficient language proficiency to help convey their meaning. They tend to gesture even more frequently when speaking with others in L2. Though gestures were used more in helping managing L2 English classroom, more focus is now on its role in facilitating L2 learners’ understanding of the contents and as a role of strategy in communication, and its role in assessing learners’ language proficiency.
Key Words: gesture; SLA at high schools; facilitating the language learning; assessing language proficiency.