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Along with the usual oblique line, the notebook uses a unique patented graphic template - a frequent oblique line - thanks to which the child can standardise not only the slope and height, but also the width, i.e. the correct overall proportions of the letters.

The best printing materials are used in the spelling books, and the colour and thickness of the lines are chosen in such a way as to reduce the strain on the child's eyesight and make the learning process as comfortable as possible. The spelling books have a sanitary and hygienic certificate and are approved by the Ministry of Education and Science of Ukraine.