Karl has received the Constance and Rose Ganoe Memorial Award for Inspirational Teaching, Gamma Sigma Alpha National Honor Society Professor of the Year, and Student Senate Professor of the Year.
He is the author of numerous articles and chapters, including a chapter in the textbook Russia and Western Civilization: Cultural and Historical Encounters (M.E. Sharpe, 2003) written in collaboration with his colleagues at Dickinson College. He is also author of the monograph From Ruins to Reconstruction: Urban Identity in Soviet Sevastopol after World War II (Cornell, 2009) and several related articles. He is currently completing a monograph about Spanish Civil War child refugees who were raised in the Soviet Union.
He teaches Russian, German, Italian, and eastern European histories, as well as courses on European dictators, urban history, historical methods, the Holocaust, and more.
He thanks Ryan Burke for his technical expertise.