these are all contributations from greek to modern life lighthouse, odometer, robot, watermill, medicine, alarm clock, maps, olympic games, citizenship, cran, shower, democracy i think i gave you quite a few choices
You could definitely include the use of philosophers' theories like Plato and Socrates. You could mention the use of Greek Myths in English classrooms today. The Pythagorean Theorem comes from Greeks. Also the use of democracy and how we use it in modern day government.