Truancy is a very serious effects, which together with other school problems (or state), parents and students contributes to reducing the level of education of the nation. This describes among other things, such as PISA 2009 (Paleckova, Tomasek, Bastl, 2010).
In the past, research was focused to detect the absence of second degree Elementary schools (Dvorakova, 2006). The present work builds on previous research done and data gathered at vocational schools and secondary technical schools.
Comparison of the results identified the absence of these two groups and verifies them.