The purpose of this study was to identify the impact of using the brainstorming method on the acquision of development problem-solving skills and science achievement of ninth grade students. The sample of the study consisted of (63) female students of the ninth grade in one of the government schools in South Batinah. It was divided into two groups: an experimental group of (30) students and a control group of (33) students. To achieve the aims of this study, the researcher prepared a teacher guide for the unit of « Electricity and its technological applications », as well as two tools: a problemsolving skills test and a science achievement test. These two tools were evaluated by a number of judges. In addition, the reliability coefficient was calculated for the two tests by Cornbach's alpha equation. For the problems-solving skills test, the reliability coefficient was (0.75), while it was (0.808) for the academic achievement test. Hence, the tools were effective for the purpose of this study. The data collected through the tools was analyzed and the results showed a statically significant difference between the experimental and control group in favor of the experimental group. This difference was significant at a level of (a = 0.05) in the sub_ skill of analysis and interpretation while there was no significant difference in the sub skill of initiative and planning and implantation and taking notes. In addition, the results indicated a growth of problem_ solving skills in the two groups, but it was significantly higher in the experimental group. This study also found that there were no statistically significant difference at a level of (a = 0.05) between the mean score of the experimental group and the mean score of the control group in the academic achievement test. In lights of these results , the study highly recommended that science teachers use this method in their teaching because of its importance in acquisition of problemssolving skills. The study also recommended that similar studies be conducted on other school subjects.