Teaching English Idioms Trough Animated Flash Videos at Secondary Level Researchers and practitioners, in the field of natural and applied sciences, generally acknowledge the worth of modern animation as an aid in teaching-learning process. Similarly, in the area of linguistics, teachers are using animation for teaching different aspects of language. English teachers, in many parts of the world, are teaching phonology, vocabulary and other language skills through animation. Idioms are abundantly found in spoken and written English discourse. Lack of idioms' knowledge can lead to communication barriers. Previous studies suggest that material for teaching of idioms should be specifically devised in accordance with learners' age, level of proficiency and cultural background.The study investigates, from both empirical and practical perspective, the effectiveness of specifically designed animated flash videos for teaching idioms. It studies the effect of animation on students' scores, their behaviour and their motivational level while teaching through animation. It also explores the English teachers' views about the possibility of implementing animation technology in secondary level English language classrooms at federal government schools. In order to meet all these objectives, the study was conducted under the umbrella of pragmatic paradigm using variety of methods, both qualitative and quantitative. The results drawn from the study suggest that animations, prepared and presented according to learners' needs and cognitive psychology, have potentials to help teachers in overcoming the problems associated with idiom teaching. Animation attracts and motivates them to learn English idioms. The study, based on its results, recommends the use of animation for teaching English idioms to secondary level English language learners. It identifies the issues associated with teaching through animation. Moreover, the study also suggests how to address these issues.