The Math Book 4 - Work Supplements is a school book specifically designed for the Bavarian curriculum, providing comprehensive support in mathematics for students in the 4th grade. The work supplements consist of seven punch-out sheets that include various learning materials, such as number cards, number word cards, and centimeter squares. These materials are designed to enhance mathematical understanding and facilitate the application of mathematical concepts. The supplements are available separately and offer a valuable addition to the regular teaching materials. The book is written in German and provides a clear and structured approach to mathematics, benefiting both teachers and learners.