My Mom completed a 1 year program at a Fashion College. But even that, she said her mother didn't understand why she wanted more school.
My Dad flunked out of Engineering school. I knew he had completed 3 years, but I never understood why he didn't finish. Then, after my Grandmother moved in with us, I was helping sort her stuff and found the letter from the school informing him. I showed them to my Mom, and she didn't know either! My Mom talked to him about it privately, and could tell he was embarrassed about it. So it was never mentioned again.
Of my Grandparents, I only know my Dad's Mom finished high school. His Dad made it through 10th, I think. I know my Mom's Mom never graduated because at one point during my lifetime she tried to get her GED, but the math was a problem for her. I'm not really sure about my Mom's Dad.