Dash and Dot is a children's programming textbook developed by American teachers. In the Dash and Dot course, students will learn programming skills such as variables, loops, and nested selection structures. With simple coding learning methods, children can easily learn coding and cultivate children's interest in writing programs. Students will learn to use Dash and Dot's four apps: Go, Xylo, Wonder, and Blockly, and these four apps are for younger students, solving the obstacles of being too young to learn programming.