goal kick

Hi All, I run a school league and one of the questions I get asked a lot is Goal kicks are usually taken on the ground, but what circumstances allow them to take the kick from their hands? I'm confused myself here, I thought that a keeper could either choose to kick from the hands or the...

I'm fairly sure that I know the answer to this, but always good to check for sure :) Defender takes a goal kick short to the goalkeeper, who has gone out of the penalty area in order to receive it. If the GK then takes the ball back into the area and picks it up, that's a backpass - right...