Didactic text during the progressive development of information technology has its irreplaceable role in the education process, not only at secondary schools and secondary vocational schools. Didactic text is the most reliable means of education and as Průcha (2009) writes the text operates satisfactorily at temperatures from -100 ° C to + 80 ° C without any maintenance. Based on experience and research, it is possible to argue that students who have a didactic text, can acquire knowledge in any place and they do not need the resources nor the Web. Such study texts must met the certain guidelines for their creation. The article deals with the creation of textbooks in the vocational training. The teaching text is described as a part of the teaching material resources and teaching aids. The main purpose of the article is the analysis of the needs of secondary schools in the use of didactic texts in the form of textbooks and the evaluation of the readability of the professional text.