I've got a "Cheater's" way to make an Elder:
1) When a kid turns 14, I will make him/her start Farming; he/she will 'usually' Master Farming by age 24-25*.
2) Then it's Research.
3) After becoming a Master Scientist (usually about age 35-36* or less!) I will "force" my villager into a Master Parent. I make either male/female kiss another villager until they become Master Parents.
Note: Male villagers can Master Parenting skills with 50+ yr old female villager. I usually let my young female villagers gain Healing skills until they are 50 before I force them to become Master Parents.
* Ages can vary, depends on how stubborn, lazy or clever your villager is! LOL!! But that's a general gist....
I hope this helps!!
