We remember the bass spaces by saying, "All Cars Eat Gas", A,C,E,G. These are the bass spaces. The A is the second A below middle C (circled in red). We "skip" from space to space, skipping a letter name in between.
Let's learn a signal. Pretend you have a steering wheel in your hands. Turn the wheel as you "drive". This will remind you that "All Cars Eat Gas", A,C,E,G, the bass spaces.