Yankton High School Code for both ACT and SAT is 421-500.
The ACT test Center Code for YHS is 226-420.
For more information on test dates or to register for the ACT Test go to www.act.org
Online ACT/SAT/ASVAB practice tests for no charge: http://www.testprepreview.com
The SAT is not administered in Yankton. See website or registration booklet for closest SAT test site.You may register for the S.A.T. at www.collegeboard.com