One of the most creative way of explaining things is to record your desktop i.e. the teacher wants to be very practical by showing the students a demonstration about the lesson. This is because the material found on the internet is too in general. The teacher knows his class, so he has to speak in a way that his students understand. The students, watching and listening to their own teacher explaining things may find it more user friendly. In other words, even if the teacher says the same things all over again, the fact that they see and hear their own teacher, works wonders! Recording your desktop gives a personal touch to teaching in this computer related era!
There is no expensive material involved, just a webcam, a microphone and a simple, free open source program which everybody knows about – VLC. As with other software, the teacher needs some time to practice and feel at home with this software. Maybe some soft music playing in the background would make it ideal for the students. Ideally for the teacher is to play some tutorials in order to feel more comfortable in using this software program. There are some You Tube tutorials as well.
Those using Linux, have a large variety such as: vokoscreen; wink; recordmydesktop; XvidCap; Istanbul; ffmpeg (mac/windows too); kazam.