RT Journal Article SR Electronic A1 Hrabí, Libuše T1 Biology textbooks of FRAUS publishing company and their text difficulty JF e-Pedagogium YR 2009 VO 9 IS 1 SP 31 OP 37 UL https://e-pedagogium.upol.cz/en/artkey/epd-200901-0003.php AB This article presents knowledge of the text difficulty evaluation of biology textbooks of Fraus publishing company . The text analysis was realized by my own methodology. Obtined results show that text difficulty is similar in studied textbooks - from 30.1 points to 34.16 points. It indicate these textbooks into the same scale of difficulty, characteristic for sixth grade of education.