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.
Let students record themselves reading a passage. They can reread as many times as you want them to in order to gain greater fluency. Students improve when they can hear their own reading, and evaluate it.
Great places to find some FREE online books & reading material for children. Includes resources for the iPad, Kindle, Nook and laptop -- and also some great finds for audio books and online learning videos!