Room and board means housing and food. You can eat everything you want for three meals a day (everything… within reason: freshmen sometimes overdo it and gain a lot of weight. But if you want to eat a plateful of everything no one will stop you.)
At work colleges, your work covers your rent, health insurance, and food. At Berea, you usually have a little left over for personal needs.
At meet need colleges like Amherst, Williams, Harvard, Yale, Princeton… you’ll get work study. You’ll need to find a job on campus. Your wages will be paid twice a month and must cover your personal expenses (housing and food will automatically be covered from your financial aid package).
When you arrive, you will need to have a little money on hand to buy sheets, a mattress topper, and towels, as well as notebooks (you can bring the pens etc). Then you’ll need to save to buy yourself a coat (appropriate for the local weather so can’t be bought in the Philippines).
Your roommate will likely bring a fan and a fridge for your room.
Classrooms and dining hall will be air conditioned. Professors are supplied with chalk, markers, etc. Note that buying stuff for professors is a big no no (except perhaps as an end of the year present).
You will have access to computers. At generous universities (like Amherst or Yale) there’s usually an amount set side to help you buy a laptop computer. You’ll need to use the college’s printer. You usually get a certain number of pages for free (normally sufficient to cover your classes for a semester) then need to pay a small amount for the next 100 pages.