One thing I learned about shutter speed is that you can freeze motion with a fast shutter speed, or you can imply motion over a longer time with a longer shutter speed. When using a longer shutter speed you must hold the camera steady to decrease blur in the photo.

Thing 1 about aperture: I did not know there was an equation to figure out exactly how much light is being let into the lens.
Thing 2 about aperture: Aperture is the angle of lines which meet in a point.
Thing 3 about aperture: Aperture size is balanced by shutter speed.

Ahoy!