This app is based on Japanese mathematics education and is specifically designed for schools. The material is structured in small steps so that students can build their arithmetic skills from basic numbers to decimals gradually and safely. In Japanese mathematics education, it is important for children to move from "understanding in school" to "being able to use it at home." Therefore, this app provides a drill mode that helps students review and reinforce what they have learned in class in a gentle and easy-to-follow manner at home. The material also uses the Japanese Sansu Thinking Map (STM) approach, which helps children think for themselves, identify difficulties, and try to solve them. This app supports a "think → try → check" learning process so that children can learn at their own pace. Key Features • Arithmetic material from basic numbers to decimals • Gradual learning with small steps • STM approach to encourage children to think independently • Practice mode to reinforce learning at home • Secure access with a school-specific code • Simple and easy-to-use interface • Materials can be updated and added as needed This app combines the power of Japanese math education to seamlessly connect school and home learning, so children can learn with greater confidence every day.