Comparative position of laboratory works in biology textbooks in Iran and United Kingdom

The aim of this study was to Comparative position of laboratory works in biology textbooks in Iran and United Kingdom. Therefore  were selected as sample the biology text book in  tenth-grade of both countries, and were analyzed based on the assessment criteria of laboratory works, then was determined the absolute frequency, relative frequency and Percent of relative frequency of each of the assessment criteria. Also was used of comparative method for comparison between two countries books. The results showed that was  the absolute frequency of laboratory works in Iran biology books 17, and in United Kingdom biology books 36.  In the Iran books was most attention to interpretation and relevance of results criteria and least attention was for  use of modern technology criteria. In the England books was most focus on the criteria of appropriateness of experiment aims with book content and the least focus was on the criteria of use of modern technology. In the Iran books was the highest percentage of relative frequency for interpretation and relevance of results criteria and was lowest percentage of relative frequency for use of modern technology. In the England books was the highest percentage of relative frequency for the criteria of appropriateness of experiment aims with book content and was lowest percentage of relative frequency for use of modern technology. Results of this study has applied for textbook authors and correction of textbook biology.