Difficult Learning Tasks in Biology Curriculum

This article contains knowledge obtained on the basis of task evaluation in current biology textbooks. Twenty seven textbooks were analysed of the Fortuna, Fraus, Jinan, Nová škola, Prodos, Scientia and SPN publishing companies. Analysis was concentrated on the diversity of difficult tasks. Attention was paid also to the number and position of tasks in texts. The difficulty of tasks was classificated according to Tollingerová. The highest diversity of difficult tasks was found in the textbooks of the Fraus and SPN publishing companies.