Teaching area of initial reading and writing is the specialty of the subject Croatian Language in the first grade of elementary school. The subject of this paper is the preparatory stage of initial reading and writing, which includes the beginning of the first grade, and its duration depends on the pupils’ abilities and opportunities. In the curriculum Teaching plan and programs for primary school (MZOŠ, 2006), in the area of initial reading and writing one of the topic is Preparation for initial writing and reading. The educational outcomes of the topic are: global reading and remembering the image of words; global reading and discovering the meaning of words and sentences; observing sounds at the beginning, in the middle and at the end of the word; creating the rhymes on the given stimulus; breaking the sentence into words. Main goals of the preparatory stage of initial reading and writing is preparing pupils for reading and writing. Preparation for reading and writing consists of: global reading; learning the terms sound/letter, word and sentences; performing the pre-exercise of speaking and listening; performing the pre-exercise for developing pre-reading and reading skills i.e. pre-exercise for reading and writing. In order to organize and achieve the goals of the lesson in the initial reading and writing, it is necessary to test pre-skills of each pupil on the basis of which the initial reading and writing process is individualized. This approach will enable the development of reading literacy based on individual characteristics and pupils needs. On the basis of all of the above mentioned, the teaching plan and program is organized and planned by developing a curriculum. The ERR system is suitable for lessons in the preparation period because it is based on the pupil's knowledge and experience and motivates them for independent work.