PT Journal AU Vranova, O TI Tasks in natural science textbooks SO e-Pedagogium PY 2009 BP 91 EP 96 VL 9 IS 1 DE Natural science textbooks; task evaluation; task difficulty; task diversity AB This article contains results of the task evaluation in natural science textbooks. There were analysed ten textbooks of the Alter, Fortuna, Nova skola, Prodos and SPN publishing companies. The attention was paid to number, difficulty and diversity of tasks in each textbook. The difficulty of tasks was classificated according to Tollingerova. The results showed - the difficulty of tasks were similar in all evaluated textbooks. The most frequent were tasks of simple cognitive level. Differences were obtained in number and diversity of tasks. ER