I don't think you're aiming at the right market though. Fundraisers at school, for a disaster of this scale, are not even scratching the surface.
My dc did a fundraising day where they went in non-uniform, sold cakes, and raised about £400, which was considered fantastic. But £400 is peanuts considering what is needed here. What percentage of your salary is that? (and if you give it to a charity they can claim the tax back too)
If you want to raise money they contacting local businesses to see what they can donate, raising it with your mp to ask what our government is sending, donating a proportion of your salary etc.
I sponsor a young girl in the Philippines. They weren't in the main path, but I'm still waiting communication to hear if they're okay. They should be, as the orphanage is on high ground, and historically has been used as a refuge centre for the local area (meaning the children there have the experience of being the helpers rather than helped, which is fantastic for their esteem). But I'm assuming they have no communication as they're usually quick to let us know. I will donate through them, because I know the money will go directly (after exchange rate) to where it is needed.
But for my young girl it won't stop there. She's got relations that are further out. She'll be waiting to find out if her ill mother has survived, and her older sister and brother. They won't have any means of communication other than visiting, so it could be weeks if not months before she knows whether they are okay. 