I have used screencast on my Mac multiple times and have helped others in my building learn to use screencast as well, but for my students I do not use my computer I actually use my iPad. It is the same thing as a screencast with a blank page and me writing. I have used aps like Doceri, Explain Everything, and iMovie with recordings. I have a flipped classroom so I use a "screencast" using Explain Everything for each of my lessons. I attached one of my videos below. I have also posted a link to my website where I keep all of my videos for my students as well.