Okay, how do i prove electrons are waves, and not particles?

im in sxth grade and we r studieing lke the atom how the nucleus is full of protons, and neutrons, and we r now b ing taught that electrons are "orbiting" around the nucleus, but acording to Young's double splited experiment, electrons are both particles and waves, i need a way to prove to stubern mr. hilkemeir that im smart, and that electrons are both particles and waves.... can any of u help? i need the answer, QUICK... and remember, im in 6th grade, no big fancy words that arent on an internet dictionary. thx.....do any of u know mr. h ?