This study aimed to investigate the effect of pre-teaching new vocabulary items via audio-visuals on Iranian EFL learners’ reading comprehension ability. The question this study tried to answer is if pre-teaching new vocabulary items via audio-visuals have any effect on Iranian EFL learners’ reading comprehension ability. To find the answer to the question, 30 intermediate level students from Rasht language institutes were selected via administrating OPT which divided them into two groups. They were both male and female. Intermediate level students were used for the current study because they were learning all skills of language at the same time, they were familiar with some words, and their English proficiency was enough to speak English and understand the importance of reading comprehension. The students were one experimental group (pre-teaching new vocabulary items via audio-visuals) and one control group (a placebo, teaching L2 reading comprehension via the existing method). The research was conducted during learners’ classes within 5 sessions in summer course, 2016. The results indicated that pre-teaching new vocabulary items via audio-visuals affected positively the participant Iranian EFL learners’ reading comprehension ability.
