Set up an online forum. Here the students can practice answering and writing questions in a non-threatening, no-pressure environment. It will help them get used to communicating in the written form. They should post at least two times a week in response to a teacher-formulated question or topic related to the primary age group of those studying and the cultural issues of the day. This will help students use words that they would not use as commonly when just rehearsing the English language.
Watch excerpts of movies and read passages from books as a class, geared towards developing dialogue. Study the setting and the questions and responses of the characters. While this is simulated, it will help students visualize what their communication with a native English speaker may look like.
Play a game. Set a timer and have students stand in a circle. One student asks a question and then passes the timer to another student who has to answer the question quickly before asking a question and passing the timer. The person holding the timer when it runs out loses and the other team receives a point. This teaches students to think quickly, answer precisely, formulate questions and answers and listen.
Assign a day of role-play to your students. They must speak only in English to their classmates and simulate a scene of natural interaction. They can ask questions for their partner to answer and discuss basic topics such as the weather and their families. Students listening to the exchange will learn and students performing the exchange will gain invaluable practice.
Speak only English in class. Part of learning English communication is speaking it daily, becoming comfortable with the flow and wording and understanding the idiosyncrasies. Since you have now been practicing communication in sound bytes, it is time to make it a permanent and sole focus of class. Teach only in English and require students to read and speak only in English. Their communication skills will enhance and become smooth with daily practice.