There are several online scholarship search sites which you could utilize. Some examples are: Bold.org, Scholarships 360, BigFuture, Appily, Niche, and FastWeb. Bold.org and Scholarships 360 are nice because they have scholarships exclusive to Bold.org or Scholarships 360 users. The only problem I find with these sites is that a lot of students apply for these scholarships, which decreases your chances of winning them. However, it is still worth applying.
Also, if you can write a decent essay, you could trying looking for scholarship essay contests. Most high schoolers avoid essay writing if at all possible, so taking part in these contests can help if your essay-writing skills are good.
If you are good at art, you can also look for art contests. I suggest this for the same reason as the essay contests.
Also, depending on which colleges you are interested in, you could try using RaiseMe. It's a site which gives you micro-scholarships for activities in high school at certain colleges. The colleges I was interested in didn't participate with RaiseMe, but it's still worth considering. I hope this is helpful!
scholarships.com, BigFuture, scholarship owl!
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