[2] In 1957, Chadderdon earned an Associate degree in education College of Great Falls.
[2] In 1979, Chadderdon started her political career as a council member of Fernan Village, until 1983.
[3] Chadderon defeated Democratic nominee Mike Bullard with 61.9% of the vote.
[5] Chadderdon defeated Democratic nominee Tamara Lee Poelstra with 58% of the vote in the general election.
[7] Chadderdon defeated Democratic nominee Bonnie Douglas with 53.51% of the vote in the general election.