• Welcome!
     Ms. Kostkan graduated from Miami University of Ohio with a Bachelor of Science in Secondary Mathematics Education and a Bachelor of Arts in Mathematics and Statistics.  This is her ninth year at DHS, and she is teaching Precalculus and Calculus!
    ***Ms. Kostkan is available to answer questions after school on Mondays, Tuesdays, and Thursdays until 4:30 pm (unless otherwise announced).  If planning to stop by her classroom, please notify Ms. Kostkan in advance.
    Teaching Schedule:

     A Day

    B Day 

     1.  Planning

    5.  Precalculus
     2.  Precalculus 6.  Calculus
     3.  Wellness Team 7.  Precalculus
     4.  Precalculus 8.  Planning