[1] The outbreak of hostilities sent her other brothers and a sister fleeing to the Soviet Union, while the rest of the family relocated to Radom.

[2] Their head counselor, Shmuel Breslaw, sent her with Aryan papers to the Warsaw Ghetto to obtain a copy of the movement's underground newspaper Pod Prąd (Against the Current) from Mordechai Anielewicz and bring it back to Radom.

[2][1][6] During the liquidation of the "large ghetto" in August 1942, Batszewa's parents and older sister were deported and murdered in the Treblinka extermination camp.

[7] As the Red Army approached Auschwitz in January 1945, she was evacuated on a death march to the Ravensbrück and Malchow concentration camps.

[5][11] In 1968 she embarked on a two-year course of study in the United States, earning a bachelor's degree in psychology at Columbia University.

[5] Upon returning to Israel, Dagan became the manager of the kindergarten section of the psychological services division of the Tel Aviv-Yafo Municipality.

[10] She also taught at her alma mater, the Shein Teachers Seminary, and lectured about the Holocaust in the United States, Canada, and the Soviet Union.

[12] In the early 1980s[5] Dagan served as an emissary for the Jewish Agency on missions to the United States, Canada, Mexico, England, and the Soviet Union.

[8][13] In January 2016, she donated to the Auschwitz-Birkenau Memorial and Museum a miniature good luck charm which she said she had hidden in her straw bedding in Auschwitz the entire time she was incarcerated there.

The charm, a pair of leather shoes measuring about 1 centimetre (0.39 in) in length, was crafted by a female German Jewish inmate, who gave it to Batszewa with the words, "Let them carry you to freedom".

Dagan's literary works include five books on Holocaust themes for children and adults, some of which have been translated into other languages,[5] poems, and songs.

[3][9] In 2010 the Auschwitz-Birkenau Memorial and Museum republished Czika, piesek w getcie and Gdyby gwiazdy mogły mówić (If Stars Could Talk) together with lesson plans for classroom discussion.

[3][11] In 2008 Dagan was named Woman of the Year in Education by Yad Vashem for her contribution to Holocaust teaching for children.