[1] Oudkerk was the last living staff member of the illustrious nursery opposite the Hollandsche Schouwburg located at the Plantage Middenlaan in Amsterdam.

There, during World War II, the personnel saved many Jewish children; Goudsmit-Oudkerk was 17 years old at that time.

She didn't talk about it, but due to the insistence of her children, she had her story written down in 2016 in the book Betty, een Joods kinderverzorgster in verzet (literally translated: Betty, a Jewish childcare worker in resistance).

[2] The first copy of her book was handed over to Eberhard van der Laan, then mayor of Amsterdam in 2016.

[3] Betty was present at many meetings in the Joods Cultureel Kwartier, at the opening of the Nationaal Holocaust Museum, and at lectures and commemorations in the Hollandsche Schouwburg.