International Students Scholarships A simple way to find study scholarships for overseas students

Are there scholarships available to American students attending non-American high school overseas?

We are American and live overseas. My children attend a private non-American school. They have expressed that upon finishing high school they want to go back to the US for college. Are there any scholarships available in this case or only Federal Financial Aid? I don't reckon they would be considered international students because they are citizens of the US. It's kind of confusing. Please help.