I want to create some screencasts with audio using Ubuntu. I also would like to be able to make "drawings", like arrows pointing at different part of the screen, shade a part of the screen and leave a portion bright.
Optionally I would also like to insert quizzes so that the video can only proceed when the right answers have been inserted.
This videos should then be uploaded on my website which uses wordpress.
What software/s can I use to do this?