When children from the first to the third grade are taught in one class, they need solid materials so that each child can learn as much as possible and no one gets left behind. This book prepares the topics "The School Opens Its Doors," "Squirrels - Agile Acrobats," and "Peter and the Wolf" for cross-grade teaching. Each topic is introduced on a starting page, followed by worksheets in three differentiation levels for the areas of reading/learning to read, writing/learning to write, and oral language use. According to the expert principle, children are encouraged to work together on a topic and successfully cooperate with each other. Learning assessments provide an overview of what each child has learned. This way, you can optimally promote individual learning in heterogeneous groups.