This study drives at developing curriculum of French language for primary grade-four using strategy of modeling and simulation for developing skills environmental of those students. In order to achieve that purpose, a checklist of the most important topics and environmental problems has been designed, that should be included within the French curriculum. A content analysis is used in terms of topics of (air pollution – the black cloud – non-renewal resources depletion – oil depletion – water pollution – water scarcity).  A scale of Skills environmental is designed and a conception of proposed two units in French is suggested, selecting unit four and six for application. These units are taught in (street – garden) containing some environmental issues and problems and using modeling and simulation strategy. The study uses the quasi-experimental method to try the two units, using as well the descriptive method to analyze the objectives and content of the curriculum of both units. Results indicate significant statistical differences exist between average scores of the experimental and the control group regarding the post-application of scale environmental skill, in favor of the experimental group. The study suggests applying those proposed two units and the scale on other various educational stages since they have proved their efficacy.