Gavrina S. E. , Kutyavina N. L. , Toporkova I. G. , Shcherbinina C. In. — Yaroslavl: Academy of Development (with the participation of AST and Astrel), 2005. — 28 s. — ISBN 5-7797-0400-7 . The authors of the manual Svetlana Gavrina, Natalia Kutyavina, Irina Toporkova and Svetlana Shcherbinina are well-known teachers and psychologists who developed the original method of developing a preschooler . Within ten years, they published dozens of manuals on the development of speech, attention, perception, logic, spatial thinking, cognitive abilities, fine motor skills of the hand, learning to count, read and write, the total circulation of publications exceeded 10,000,000 copies. Due to their simplicity and scientific, accessibility and effectiveness, the developing notebooks of these authors are very popular with several generations of young parents.