Research scholarship opportunities. Many organizations that offer scholarships for high school students have websites online. You can also locate scholarship opportunities through printed directories, such as Laurie Blum's "Free Money for Private Schools" which contains an alphabetical list of foundations offering scholarships, as well as contact information, sample applications and other pertinent information for each listing.
Organize all information and documents needed for your applications. These typically include your family's tax information, a current public school report card and a signature from the principal of the private high school you wish to attend.
Complete each application as precisely and honestly as possible. An application that is missing crucial information can be disregarded. Craft a well-written application essay, if required, that explains your qualifications and interest in the scholarship. Double-check each application before you submit it for completeness, accuracy and proper spelling and grammar.