Implementing open teaching - but how? Open teaching is considered ideal not only in the subject of mathematics. But how can this theoretical approach be put into practice? How do you open up your mathematics lessons in practice, and how do you handle preparation and follow-up? This volume provides you with all the materials needed to successfully implement open mathematics teaching in 4th grade. Independent and productive learning is key! The book shows you how to apply important curriculum topics in 4th grade mathematics using cooperative learning methods and student-centered free work. Ready-made lesson plans offer you concrete guidance, ensuring that open teaching works well not just in theory. Teaching materials for individual support complete the package with numerous worksheets as photocopy templates and many others.