The study aimed to evaluate the effects of brainstorming techniques applied to speaking performance of the 6th graders’ students. To fulfill the aim, the study employed a CAR research design with the participants of 41 students from one class in Bac Ninh Province. A pre-test, a post-test, a questionnaire, and interviews were the main sources to collect data for the analysis. The findings revealed significant positive effects of brainstorming techniques on speaking performance for students. Furthermore, results from the two cycles pointed out that this technique brought back positive academic performance in teaching and learning English. The speaking ability of students and their interests in learning English were improved significantly. However, the results would have been more trustworthy if the implementation had been carried out with more classes of students.The study aimed to evaluate the effects of brainstorming techniques applied to speaking performance of the 6th graders’ students. To fulfill the aim, the study employed a CAR research design with the participants of 41 students from one class in Bac Ninh Province. A pre-test, a post-test, a questionnaire, and interviews were the main sources to collect data for the analysis. The findings revealed significant positive effects of brainstorming techniques on speaking performance for students. Furthermore, results from the two cycles pointed out that this technique brought back positive academic performance in teaching and learning English. The speaking ability of students and their interests in learning English were improved significantly. However, the results would have been more trustworthy if the implementation had been carried out with more classes of students.