Abstract
Curriculum and Extra-Curriculum activities are one of the basic elements in school education. These activities are designed to mold students to become a rationale, pragmatic and knowledgeable citizens in an increasingly diverse and changing world. Unfortunately, in Saudi, studies which measure the extent of curriculum and Extra-Curriculum activities’ in developing environmental skills and values among Saudi's secondary students was rare. Therefore the present study was planned to investigate the effectiveness of the curriculum and Extra-Curriculum activities in developing environmental skills and values among the Saudis’ secondary students. This study aimed at examining the effectiveness of the module, based on the curriculum and Extra-Curriculum activities focusing in developing environmental skills and values among the Saudis’ secondary Biology students. A Random sampling of the study consisted of (100) students of each gender “males and females” at Al-Jouf Educational District in Saudi Arabia. Analyses of the findings reveal that students who were exposed to the curriculum and Extra-Curriculum environmental intervention module significantly improved their environmental skills compared to their counterparts in the control group. In addition, when gender effect was measured, it was found that significant improvement occurred within both female and male groups. The findings will then lead to several suggestions on how to improve the existing teaching of environmental issues within the context of Saudi's Biology classes.