A Chalk Talk is a silent activity where students reflect and share their ideas anonymously in writing on a large sheet of paper in response to a prompt. It allows all students, including introverts, to participate equally. Students build on each other's ideas, which can help change or expand their thinking. Chalk Talks are useful for engaging all learners, promoting independent thinking, exposing students to different perspectives, and encouraging reflection and problem-solving. The teacher can use Chalk Talks to assess understanding before or after a topic.