To those who are still not aware or unsure with regard to their precinct numbers and don't know which school to go to, you may visit www.comelec.gov.ph for an easy way to find out your voting precinct information (click here to go directly to Comelec's precinct finder). I tried searching mine today and I was satisfied with how quick and easy the search came up considering it's a government website (because most government-run websites in the Philippines are either taking too slow to load up or they are always down. Laughs!)
Anyway, I hope this information helps. And remember to always vote wisely!
Here's a screenshot from the COMELEC website: