CLUE #1 FOR LUVRGIRL - SCIENCE IS NOT A DEMOCRACY WHERE NON-SCIENTISTS SUCH AS YOURSELF GET TO VOTE ON WHAT THE BEST IDEA IS.
Clue #2 - gravity is one of the most elusive and least understood physical phenomenum in all of science. The General Theory of Relativity is less than 100 years old and isn't anywhere close to being conclusively proven. All the experimental evidence to date confirms it - but there are still multiple multi-billion dollar and multi-decade/century experiments that need to be/are being done to prove it conclusively. LIGO, and Gravity Probe B are examples.
Therefore - we definitelty shouldn't teach gravity in school until we know everything there is to know about it. Until then, we'll just explain to the kids that gravity is due to God.