Since vocabulary is a strong predictor of reading comprehension, vocabulary homework is seen as a way to improve reading comprehension. This study utilized an online learning platform to deliver vocabulary homework to students learning reading skills in the classroom and compare their scores with students given paper-based homework and those who did not receive any homework. The objective of the research was to determine the differences in reading achievement between students who were given either paper-based vocabulary homework or online vocabulary homework, in addition to classroom face-to-face interaction (experimental groups) and those who only participated in face-to-face interaction in the classroom (control group). Two experimental groups were instructed to complete vocabulary homework outside of the classroom. The selected vocabulary for homework consisted of 400 words common to the target academic texts. The data were collected by administering a reading comprehension pre-test and post-test, where five academic texts were used with approximately ten questions for each text. The results revealed a p-value of 0.047 for the paper-based homework group, 0.045 for the online vocabulary group, and 0.338 for the control group, which suggests that both experimental groups outperformed the control group in the post-test.