The author of the books of this series is Zemtsova Olga Nikolaevna, candidate of pedagogical sciences, head of the Center for preschool development and parenting. The purpose of the method developed by the author is the comprehensive development of the child, taking into account the requirements of modern preschool education. The methodology of O. N. Zemtsova forms in children not only a knowledge system, but also a positive attitude towards learning, self-confidence and a focus on results. In this series you will find books with test items of three difficulty levels for different age groups. Pursuing books, you will be able to test your child’s knowledge and learn what skills require additional development. It is recommended for classes with children in kindergarten and at home.