Abstract
The aim of this study was to identify the effectiveness of a developed Instructional Unit Based on International Standards in Nutrition and Sports and Examine its Effectiveness on Improving the Physical Self-Concept Among Eighth Grade Female Students in Jordan. The students were selected from the eighth grade students in the first Secondary university schools –Femal- in the capital Amman during the Second semester of the academic year 2017/2018. The researchers identified the private schools that include two divisions of the eighth grade and chose one of them. One of the two divisions was randomly assigned to be an experimental group (26) and the other to be a control group (29) students. In order to achieve the objectives of the study, the measure of the self-concept of the body was composed of (24) items. An Instructional Unit was developed in the vocational education curriculum based on international standards in nutrition and sports to measure its effectiveness in improving the concept of the physical self. The developed unit consisted of (8) international standards in nutrition and sport, where (36) outcomes were derived, and were implemented in (20) Forty-five-minute lessons.
 
 The results showed a statistically significant effect on the developed unit based on the global standards in nutrition and sport. The level of the self-concept of the students in the experimental group was higher than the students of the control group.
Highlights
Human, as far as resource is concerned is rendered the basic wealth of any society, and no economic or social development can be achieved unless preceded or accompanied by human development
An Instructional Unit was developed in the vocational education curriculum based on international standards in nutrition and sports to measure its effectiveness in improving the concept of the physical self
The results showed that the students of the Faculty of Physical Education had a positive perception of their physical self and their health represented by the body mass index (BMI)
Summary
As far as resource is concerned is rendered the basic wealth of any society, and no economic or social development can be achieved unless preceded or accompanied by human development. The body mass index (BMI) is the classification method used to measure whether one is overweight and or obese (World Health Organization, 2018) This was confirmed by the results of the study of Obeidat (2015), which aimed at identifying the relationship between the concept of the physical self, as indicated by the BMI and muscle strength in the students of the Faculty of Physical Education at Yarmouk University. The researchers noticed the prevalence of obesity among some students at this stage and dissatisfaction with their physical image
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