This teaching aid book, titled "Study of the Environment", for the 3rd grade of primary school, is a systematic work that:
-Aims at the most comprehensive study of the contents of this specific lesson.
-Is addressed to the students of the 3rd grade and their parents, as well as to fellow teachers.
-Is organized, in terms of its content, according to the content of the school book.
-Functions as a supplementary and parallel to the corresponding book.
-Is an important guide for anyone interested, as it provides immediate solutions to practical issues with the material it contains. [...] (from the introductory note)