The current research aims to identify the impact of the R.E.A.C.T. strategy on the achievement of sixth-grade science students in biology. The research sample consisted of 65 students, divided into 33 students as an experimental group and 32 students as a control group. A partially controlled experimental design was chosen for the experimental and control groups, with a pretest to implement the experiment. To achieve the research objective, the researchers developed a test of 40 items. The results revealed that the experimental group outperformed the control group in achieving biology achievement. In light of the results, it was concluded that the Ministry of Education's Directorate of Preparation and Training must provide specialized training courses for biology teachers and other science subjects. It was also proposed to hold training courses that include how to use the (R.E.A.C.T.) strategy and employ it effectively in classrooms to raise academic achievement.