Theoretical Foundations of Elementary School Mathematics Course (Values and Their Measurement) : The textbook, created by the team of authors, is a unique and comprehensive source of knowledge intended for teachers, students of pedagogical universities and all those who are engaged in the preparation of future primary school teachers .. This book is not just a textbook, but a real guide to the formation of fundamental mathematical concepts in younger schoolchildren, revealing the secrets of effective learning and the development of children's interest in mathematics from an early age. The focus of this work is on the most important topics related to the concept of magnitudes and their measurement, which are the cornerstone of elementary mathematics. The authors analyze the theoretical foundations in detail, demonstrating how to correctly and interestingly introduce children to the concepts of length, mass, volume, time and other physical quantities. The book is not limited to dry theories - it is filled with practical recommendations, methodological techniques and examples that help teachers turn complex abstract ideas into accessible and fascinating lessons. A feature of this tutorial is its systematic approach to learning. A team of authors with rich pedagogical experience and knowledge in the field of methods of primary education has created a book that helps to understand how to form children not only knowledge, but also skills, skills and interest in mathematics. The book deals in detail with the development of logical thinking, the formation of primary ideas about measurements and comparison of quantities, as well as methods for verifying and securing the knowledge gained. All materials are accompanied by vivid illustrations, didactic materials and assignments, which makes the book a valuable assistant for teachers and methodologists. This book is especially suitable for elementary school teachers, students of pedagogical universities, as well as for parents seeking to understand how to correctly and interestingly introduce their children to the basics of mathematics. It will be useful for those who are looking for new ideas for lessons, want to expand their knowledge of methods of teaching measurement and working with quantities, as well as for those who appreciate a systematic and scientifically based approach to teaching. The topics raised in the book are relevant and important, because it is the correct understanding and mastering of the concepts of magnitudes that lays a solid foundation for further study of mathematics and natural sciences. The authors emphasize that measurement training is not only the development of mathematical thinking, but also the formation of practical skills in children, the ability to navigate the world, draw conclusions and make decisions. The style of presentation in the book is clear, logical and accessible, which makes the material understandable even for novice teachers. Team of Authors , known for his work in the field of methods of primary education, It has a modern approach ,. Combining theory with practice, What makes a book not only a tutorial , And a guide for them. Who Wants to Make Math Lessons Bright? , [ ) Very interesting and effective. [ If you are looking for a book that will help you better understand the theoretical foundations of an elementary school mathematics course, as well as acquire practical skills to teach children measurement and how to work with magnitudes, "Theoretical Foundations of an Elementary School Mathematics Course (Values and Their Measurement)": : Training Guide" is exactly what you need. This publication will become a reliable assistant in your pedagogical practice and will help to unleash the potential of each child, awaken his interest in mathematics and make learning an exciting journey into the world of numbers and measurements.