Mathematics
DHS Math Department Teachers
Mr. Stephen Riopell - Department Chair, AP PreCalculus, PreCalculus, FLEX
Mr. Ethan Barnes - Algebra 1, FLEX
Mrs. Alyson Ferren - Algebra 1, Geometry, FLEX
Mrs. Bethany Free - Algebra 1, Geometry, FLEX
Mr. Richard Koss - Algebra 2
Miss Kaitlyn Pugh - Honors Geometry, Algebra 2, College Prep Math
Ms. Rachel Seibert - Transitional Algebra, Algebra 2, AP Calculus AB/BC
Mr. Mitch Thomas - Algebra 1, Honors Geometry
Mrs. Andrea Van Leer - Geometry
Mrs. Kelly Yohnka - Honors Algebra 2, Math Topics, Statistics
Mathematics Graduation Requirements
Students must successfully complete three years (six semesters) of math courses to graduate from Danville High School. This must include a full year of Algebra and a full year of Geometry while in high school.
Students who successfully complete Algebra 1 in eighth grade must still complete three years of math while at DHS.
It is strongly advised that any student who is college-bound complete four years of math while in high school.
Click here to view the 2026-2027 DHS Course Guide. Math course descriptions can be found on p.55-57.
DHS Math Department - Celebrations!
Annual First Grade Math Challenge (2026)
Mrs. Free - Dr. Fields Excellence in Teaching Award (2025)
Honors Geometry Cardboard Boat Races (2024)
Ms. Seibert - T.E. Rine Award (2024)
Mr. Riopell - Golden Ruler Award (2023)
Mrs. Yohnka - News Gazette Teacher of the Week (2016)
Mini-Golf Geometry Project (2010)