<p>"If you have attended any other schools, please indicate number of schools:"</p>
<p>Does this mean high school only? Or does elementary and middle apply as well?</p>
<p>On the sidebar on commonapp it says ‘If you have attended more than one high school, enter the number from the drop-down list. Zero is an option if you have only attended one school.’</p>
<p>So only high school.</p>
<p>Nothing about elementary or middle school is relevant for your college apps (unless you took courses of HS credit in middle school).</p>