Well if you don't go to your teacher and are determined to deal with this in your own way, own your presence and be at one with yourself. If you are obese well so what, we have all shapes, all sizes and some people with bits missing or not working properly. If you wear glasses so what. If you are nerdy so what (you will go far) just don't let these people get under your skin.
Human nature identifies differences, and pulls jokes, and wants to make themselves look good at the expense of others. But not every body is like this. Some will want to be your friend. If you show that NOTHING at all gets to you - you win - you win every time even though it hurts. However, know when teasing has turned into bullying which some kids will do for power, to keep control and make themselves look good.
Just say thank you very much and smile at someone who scowls at you or gives you books. It's far harder to be horrible to someone who is nice, says nice things to you and makes you feel good about yourself. So be that person that makes others feel good, or gets them laughing with you, not at you.
Turn it all back on them and smile and laugh at their stupidity.
You are the role model for every other person in class who has been ribbed and taunted by just these same horrible people. But they will all need something from you at some time down the line. Probably how to do home work or how to do sums, questions etc use this knowledge wisely.
What are your strengths - hold onto them. Make friends with people other than the horrible one's. Tell people all about the Philippines, so many will not know what it is like. But any time anyone taunt's or teases just show no sign of getting irritated. Eventually they will find new fresh blood to taunt when they realise they can't get any mileage out of you.
If the school has any 'buddy' system use it, it might help you to find your feet. If you have confidence in the school support systems try and talk to someone you trust, teacher, counsellor, helper and ask for advice on how best to get through the next few weeks here. You need to trust someone to help you where they can, and that might even be just to listen to your plight.
You have overcome so many hurdles to get where you are right now. Don't let some self centred class mates spoil your life in a small environment that won't be like that for ever. You are getting ahead and deserve to do well. You class mates have already identified you are very clever, and that might threaten them because they know they are not very bright. Don't turn nastiness back on them but be a role model, tell them when they are being unkind and win this one. I hope you can do really well going forward.