Introducing children to mathematics as a special method of cognition is impossible without clarity. We offer a variety of counting, geometric, additional material with samples of numbers, coins, signs of action, which should be used when organizing an oral account, repeating the composition of numbers, composing expressions and problems. The world of a child is a game, vivid images. The offered didactic materials will help to make mathematics lessons non-standard, will encourage children to study, will promote the development of mental abilities, memory, imagination, attention, logical and critical thinking. Correctness and legibility of mathematical records are an integral part of communication culture. Therefore, teaching children the calligraphic writing of numbers is as important as teaching the writing of lowercase and uppercase letters of the alphabet. The manual provides examples of writing numbers and numbers approved by the Ministry of Education and Science of Ukraine. The content of the manual corresponds to the State Standard of Primary Education and standard educational programs. For 1st grade teachers.