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.
The End of the Jar is a great way to end the school day and wonderful for classroom management! Love this. I do this with my bus riders in elem and middle school to keep them calm and positive at the end of the day.