ENThis article explores uses in English Key Stage 4 History teaching (ages 14-16) of The Jäger Report. It discusses how the report can be used to illustrate the initial phase of the Holocaust in Lithuania, following the German invasion of The Soviet Union. It also considers the ethical complexities of using this source in teaching, including the risks of data reductionism, and steps that can be taken to mitigate this risk. Finally, it considers how the source can be used in dialogue with the words of witnesses and survivors to challenge the voices of the perpetrators. Keywords: Holocaust, Lithuania, collaboration. [From the publication]