The study explored the area of idiomatic expressions as being important linguistic units for learners of English as a Foreign Language. The study aimed at investigating the role of innovative teaching methods of idiomatic expressions in improving writing and communicative competence and whether these expressions have effective role in improving the students' performance in language. The study highlighted the important part that idiomatic expressions play in English as a foreign language. However, learners with cultural literacy and language weakness are often challenged by idioms.