Where can I find scholarships or grants for mixed students?

Instead of searching for biracial scholarships, search for both African-American and Panamenian scholarships… you'll find twice as many and from groups that are likly to give you more money than something you're having trouble finding anyway. (Try the United Negros Foundation, they have excellent scholarships.)
References :
I'm mixed as well (Nubian, Cherokee, and German).

I recommend using a combination several approaches to locate scholarships and financial aid for college. There are scholarships for many things including ethnicity, religion, hobbies, and club memberships. All the sources, that I mention below, are free to locate scholarships and apply for them.

First, fill out the FAFSA form. It will tap into need based financial aid from the state and federal governments along with the college itself. For the fall semester or quarter, the application becomes available on January 1. A person applies each year of college until graduation. It works for undergraduate and graduate school.

Second, current high school students can locate local scholarships at the high school guidance office.

Third, the college's financial aid office and website has a list of private scholarships offered from outside organizations and companies.

Fourth, the public library has a book listing scholarships with some not even listed on the web.

Finally, I recommend joining several free membership scholarship search websites. I recommend searching for scholarships based on both being a Latina and African American female. Most are updated on a regulra basis. Most offer a customized search based on information entered onto a form on the website.

Good luck!
References :
http://www.fafsa.ed.gov/
FINANCIAL AID ADVICE
http://www.collegeanswer.com/
http://www.finaid.org/
http://www.collegeconfidential.com/
http://www.collegeview.com/
SCHOLARSHIP ESSAY ADVICE
http://www.scholarshiphelp.org/
http://www.collegeadmissionsessays.com/
http://www.freschinfo.com/
http://www.princetonreview.com/college/apply/articles/process/essayjump.asp
http://www.gradesaver.com/resources/scholarship.html
AFRICAN AMERICAN SCHOLARSHIPS
http://www.littleafrica.com/resources/scholarships.htm
http://scholarships.fatomei.com/african.html
http://www.minority-scholarships-guide.com/african_american_scholarships.html
http://www.uncf.org/
http://www.abetterchance.org/ReferralOrgs&Resources/Res-coll_afric_schol1.htm
http://blackstudents.blacknews.com/
http://www.minority-scholarships-guide.com/
http://www.sjaacsa.org/links.htm
http://www.finaid.org/otheraid/minority.phtml
http://www.nul.org/scholarships.html
http://www.jackierobinson.org/
http://www.ronbrown.org/
http://www.mcdonalds.com/rmhc/index/programs/rmhc_scholarship_program.html
LATINA SCHOLARSHIPS
http://www.laef.org/
http://www.lulac.org/programs/scholar.html
http://www.lnesc.org/
FREE MEMBERSHIP SCHOLARSHIP SEARCH WEBSITES
http://www.scholarshipexperts.com/
http://www.findtuition.com/
http://www.brokescholar.com/
http://www.gocollege.com/
http://www.fastweb.com/
http://www.careersandcolleges.com/
http://www.schoolsoup.com/
http://www.studentawards.com/
http://www.clubaward.com/