In order for a student to write correctly, he/she needs not only to know the rules of the Russian language well, but also to practise a lot. The proposed manual is addressed to first-graders and is designed to form and consolidate the skills of literate writing, as well as to repeat all the rules studied in the 1st grade. A large number of exercises on spelling "zhi - shi", "cha - shcha", "chu - shu", "chk - chn", soft sign in words, etc. will help children to avoid writing mistakes in the future. Spending only 10 minutes a day, a schoolchild will be able to bring the skill of literate writing to automaticity. The simulator has three modes of operation: "Study", "Self-check" and "Knowledge Control", which allows you to objectively assess the success of the schoolchild in mastering the selected topic (the assessment is made by the computer). The simulator is designed with due regard for the age characteristics of elementary school students and compliance with sanitary requirements when working on a computer. Changing the size of the simulator's working field makes it possible to use it both on an ordinary computer for individual training and in the classroom when using an electronic interactive whiteboard.