The purpose of this study is to identify how much vocabulary learning at Bac Hong Primary School is facilitated by behavioral learning-based activities. For four months, 84 pupils from classes 5A and 5B at the school will participate in the study. The experimental investigation uses a pre-test, four posttests, and class observation as its data gathering tools. The study’s findings demonstrated that, in contrast to the control group, the students in the treatment group, where the researcher used the TPR approach based on behavioral learning theory, had positive attitudes and were making progress in their vocabulary acquisition of English. Finally, it is highly anticipated that the study’s findings will contribute to the advancement of vocabulary instruction in English.