Albert Einstein was born in 1879. I was very impressed that by the age of twelve he had mastered euclidean geometry. Soon after he began to investigate infinitesimal calculus. I kept this in mind as I was teaching my class of twelve year olds how to reduce a 600 euro sofa by 40%. And boy, am I glad I didn't have little Einstein before me. I'd never have coped with trying to work out any of those problems.
One aspect of his biography struck a chord with me. While attending Secondary school in Northern Switzerland, he stayed with the family of Professor Winteler. He fell in love with the family daughter Marie. Albert went on to college and Marie took a teaching post nearby. However that was the last mention of poor Marie! Einstein hit it off with the only woman in his course in college, Mileva Maric (typical). They had a daughter in 1902 and got married a year later.
I hope Marie met a nice man and lived happily ever after!!!