I used Explain Everything appsto.re/us/mCs08.i . You can purchase it for free, $7.99 or $15.99 but I used the free version to create a tutorial for Adobe Spark Video appsto.re/us/7vp0Y.i which is free as well. These tutorials are goo for the classroom for indidvudial projects where you are not able to help each student so they have a reference point or in a flipped classroom where students are doing work and learning outside of class.