Lesson 11: How to make a transparent gif

I wanted to make a transparent gif for a university assignment. I found an image which was a jpeg and in Photoshop, I removed the background with the magnetic lasso tool and saved it as a gif. Here is the tutorial I used. It is quick and easy.

Before - it has a white background so you really can't see it here, sorry :(

After - now it has a transparent background and I've re-sized and flipped it obviously.