The new educational program introduces the principle of interdisciplinarity in education. Specifically, the "Study of the Environment" lesson 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 handbook includes: a concise presentation of the concepts of each chapter, answers to the questions of the textbook and 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 2nd 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.