Jing is a product that can capture either a still image of anything on your screen or a recording of up to 5 minutes of your screen. Wouldn’t it be handy to show the students how to do something, rather than just trying to explain the steps. Once you start using screen capture you wonder what you did without it. It is great for taking a picture of a website, Google earth images, or application instructions.
Jing is made by Techsmith who makes the best and most widely used professional screen capture applications. This free version is easier to use and has most of the features that you would need as a teacher. Jing is also Mac or Windows compatible.