The present research aimed at enhancing secondary school students' English language vocabulary aacquisition and academic engagement  through using REACT strategy. Participants of the study were 60 first year secondry school students in Elkharga city, located in the New Valley governorate. The research adopted a one-group pretest-posttest design. The researcher prepared materials and instruments of the study (a list of English language vocabulary' skills , teacher;s guide based on REACT strategy, English language vocabulary' test and Academic engagement' scale). In the pretest, using the REACT strategy was implemented, and the participants were then post-tested using the vocabulary test and academic engagement scale. The results of the research showed that the use ing REACT strategy proved to be effective in developing first year secondry school students ′ English language vocabulary' skills and academic engagement. The research concluded with some recommendations and suggestions for students, teachers and curriculum designers. Also, suggestions for further research were provided.