I attended two different high schools and was wondering what kind of impact that may have.
Hello! I attended two high schools as well. As far as I know, I don't believe they hurt your admissions process. I moved my sophomore year to a new school because of my dad's job, and I don't believe that has hurt me in my application.
The only downside of switching high schools is that grading and curriculums are different for every school. For example, I went from a school with very few AP courses and challenges to a school with many. Since I couldn't take an AP course in my freshman year, my GPA and class rank were affected. However, many colleges do a holistic review, so I would recommend including the fact that you moved in your Additional Information section of the application.
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Sorry it should say “admissions process.” Not enough characters