Here is an activity that I use with most my students, no matter the level or the language.
We all know that speaking is one of the most difficult parts (of exams and not only). A way to make students speak, is to have them describe something.
Mobile phones come to our rescue and students can use them to take pictures and show them to the rest of the class. This can help especially shy students who struggle with speaking to talk about something that interests them. They can even prepare it beforehand if they are not sure of the language, you can talk with them about their mistakes if any and them have them present it in class.
In the video my students describes what she did last weekend.