Por si algún profe quiere investigar sobre estas 70 apps y ver si le son de utlidad. Yo uso algunas // The 70 Best Apps For Teachers And Students - Edudemic. These are listed as itunes apps, but I'm sure a lot of them can be found for Android as well.
Would you rather . (Ice breaker) Put numbers beside the questions, go around the room, and have the kids pick a number. Whichever number they pick is the question they get to answer. Maybe even have them make up their own questions.