For different strategies used for students, teachers have to comunicate them the clare objectivs. It is very important using a current bibliography and innovative resources. The use of English like a different language shouldnt be a problem and a stress situation. Starting from the level to understand, listening, speaking, is neccesary to design each activity.
So, engage is the first way to transmite to students an atmosphere of confidentiality and fun. Some ways to engage is through games, challenges or any activity that allows them to participate without fraid to make a mistake.
Listening the opinion about a topic for me is a good student´s engage. If the class is in other language, the engage´s fase will be directed to enter into trust but leaving confort zone.