One of the major skill sets of a great language teacher is the ability to "prompt" students so they will generate language. It isn't easy and with time a teacher becomes better at replying, prompting, leaving unfinished, their utterances so that students are put into a position of "having to communicate". It is a skill that even gets more refined as the teacher adapts and scaffolds at just the right level/language.
EFL Classroom 2.0 has so many online language generators that help teachers out in this regard. I've put together many that can with a click of a mouse, start students talking. Also, in ppt and paper/flashcard form. Here's a list - try them with student and I'm sure you'll see they work like a charm. The teacher just keeps circulating as students take turns in groups, answering the prompt.
These 100 conversation starters are the most common questions people ask each other and are curious about.
Play the powerpoint which changes and beeps every 25 seconds or just use the one with no sound setting. Also, handy printable cards of all questions that students can use offline in a group for a conversation game. Hours of speaking fun. Make sure your students ask follow up questions! Can also be used as writing prompts - production is production ....