The new educational program introduces the principle of interdisciplinarity in education. Especially the lesson of "Environmental Studies" provides fertile ground for its implementation, as it familiarizes students with the acquisition of basic concepts as well as social skills. In this context, this manual includes: a concise presentation of the concepts of each chapter, answers to the questions of the textbook and the workbook (with explanatory comments and instructions on how to conduct the tasks), additional exercises, and evaluation criteria. It is addressed to both the student of the 1st grade of primary school who needs a systematic presentation of each lesson and a guide for school assignments, as well as to the parent or teacher who is looking for additional material for the lesson.