PRESENTATIONS ONLINE
Some good tools for making presentations online are these: you need to have an account and once you are registered you can use them for making interactive presentations online.
Here are some video tutorial about the tools you can use online
Thinglink
Prezi
Tackk
Adobe Spark
Recording Tools
You can record your voice or make a video by using some free tools online: the recordings will be available as MP3 and MP4 and can be saved on your computer.