My Scholarship Central: https://myscholarshipcentral.org/
Journey To College: https://journeytocollege.mo.gov/
The college you are attending might also offer scholarships. You can always look through their website to find those. Typically general scholarships are under "Financial Aid" or "Scholarships". However, once your FAFSA is complete and you are accepted into a college, that college will offer additional finance aid in your student account.
Below are scholarships for each grade!