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.
Transition words for essays comparison and contrast Compare and Contrast Transition Words. What are compare and contrast transition words? Before you can understand what they are, you should know the use of transition.