Greetings!
I use Apple's Keynote application to teach English to my students. Some students take lessons one to one, and others take lessons in small groups.
I present the lessons that are on an iPad via a small wifi called an "AppleTV" to HDTV screens. The ATV links to the iPad wirelessly, and to the HDTV via an HDMI cable.
I create the presentations on my Apple iMac. I use DropBox to move the lessons from My computer to the iPad. I usually create my own lessons but I also use the lessons offered by students or other teachers.
Yes, I am an Apple fan boy. But it just works! I hate computer problems. I taught for many years in the USA and in China in schools that used Windows XP, and PowerPoint to do what I do now for myself. I enjoy the process and enjoy learning about new ways of doing things.
I will post new keynote files here if anyone is interested in sharing them.
Mr. Miner