The study aimed at developing attitudes and skills of solving environmental problems for first preparatory students so the researcher developed a unit by using mathematical modeling, a scale for measuring environmental attitudes was prepared also for identifying students' attitudes towards environmental issues and problems and scale of environmental skills for students to solve environmental problems, both of attitudes scale and skill scale were applied on group of students (30 students) in preparatory school in Shubra El-Khema area, then the researchers taught the developed unit for two weeks between (5/10/2015) to (19/10/2015), then they applied the same scale that was applied on the same group of students before teaching the unit. Results revealed that there are statistical significant differences between pre and post application of the scale in favor of post application, results revealed that: There is a statistically significant differences at (0.05) significance level between degrees averages of first preparatory grade students in environmental attitudes scale before and after teaching developed unit in favor of post application. There is a statistically significant difference at (0.05) significance level between degrees averages of first preparatory grade students in pre and post application of scale of solving environmental problems in favor of post application.