I would ask you're parents to learn mnemonics. You can't fight alzheimer's disease it is too powerful, you can get checked for it. If you're parent does have it then their nothing you can do.
I don't know much about the medical concept of the disease, but I know that it is something to do with a buildup of something in your brain, which causes gaps in the memory portions of the brain. Alzheimers can be fought by increasing awareness.
Okay the tops is wrong, look in wikipedia. Well Alzheimer can be reversed in rats by drugs and something called deep brain stimulation when you're asleep, however it will take awhile for the treatment to be wide spread. So their is some hope for the future.

Has you're mom got Alzheimers?