DIGITAL SYSTEM OF A TEXTBOOK OF SCHOOL BOOKS   Responding to the needs of modern teaching and new generation accustomed to the digital environment and a different approach to information, school book offers teachers and students a complete digital system of textbooks for the new age of teaching and learning.   The digital system e-sphere is the result of continuous work of prominent local authors, experts and teachers, monitoring of new features and technologies and continuously bring content and tools with the principles of learning and teaching and to the new demands of teaching and learning. Its functionality and proven, professional and methodically designed facilities fully meets the needs of Croatian teachers and students.   The digital system is designed to enrich the teaching and teachers facilitate preparation. It enables the availability of textbooks written by top experts, scientists and practitioners, based on many years of experience in teaching. These are textbooks in each teaching unit further enriched didactic carefully crafted digital content and are thus in line with the principles of learning and teaching and directed towards the achievement of educational outcomes.