You can talk about some material used for buildings for the science sentence, and use math to help organize marching soldiers to war, and say something about like finding a new type of medicine?
Medicine -Hippocrates was called "father of modern medicine" and he was one of the first doctors who created an oath (Hippocratic oath) still used by medical students graduating
Science -observed all matter is made of atoms -after Athens defeated Persia they became the center of Greek culture and science
Math -Archimedes figured out the lever and pulleys system - Pythagorus created the Pythagorean Theorum (a^2+b^2=c^2) -mathemetician Euclia wrote a book called "The Elements" used to teach geometry.
