Seyed Heydar Azarkasb - Department of Educational Sciences, Arak Branch, Islamic Azad University, Arak, Iran
Ezatolah Naderi - Ph.D, Department of Educational Sciences, Science and Research Branch, Islamic Azad University,Tehran, Iran
Maryam Seif Naraghi - Ph.D, Department of Educational Sciences, Science and Research Branch, Islamic Azad University, Tehran, Iran

The natural sciences lesson is one of the most important and basic lessons of the educational courses. The investigation of the natural sciences book content adaptation of the sixth primary grade along with the educational and learning the natural sciences purposes should be also implemented in the national lesson plan regarding to the main aim of the present study. The main research plan of the present study is established based on applied type of study; it also is a descriptive type of study due to its gathering data method. The statistical population of the present study includes the national lesson plan, teacher guide and lesson book of natural sciences in the sixth primary course during 2014-2015. This has been also carried out by William Romi content analysis method. The obtained results of the study for the natural sciences book content in relation to the challenging with text coefficient is 0.77, challenging with pictures coefficient is 1 and the challenging with book questions coefficient is 2.33 in this study. These degrees of the learners' challenging coefficients with text and picture are established between 0.4 to 1.5 domains; according to William Romi, this activated method is given but the challenging with book coefficient is 2.33 as inactivated in sixth grade. Based on the results of the study, it is suggested to represent the designs and challenging of the learners along with applying the cognitive skills and the implementation of the experimentations in order to obtain the related responses.

national lesson plan, contextual analysis, natural sciences, sixth primary grade