Abstract: The research objective of this study was to explore the effectiveness of online resources in teaching English grammar skills to English as foreign language (EFL) students at the tertiary level. The aim was to assist EFL teachers in maximising the efficiency of their English grammar lessons through the use of online resources. The sample for the study constituted of 250 first-year English Programme students. Present simple and past simple were selected as testing items. Data were collected using students’ entry-level test scores prior to the intervention and exit-level test scores after intensive training and practise using various online resources. An important variance was identified between the results of the entry-level and exit-level tests. Also, the participants’ perceptions about the effectiveness of online resources in the language learning process were analysed using a quantitative method. The outcomes confirmed that a vast majority of the participants were in favour of integrating online resources. This research also provides valuable suggestions and potential implications for the current study.