I’ll never forget it. It was a workbook to practice writing letters and numbers. I’m sure it was only a single page but it felt like an entire book.
To answer your question, I went to a British run private school. Think of it as a stereotypical British prep school, down to the uniform, but not in the UK. Also, they jumped me a year because in pre-school I was always sneaking into classes rather than napping or playing.
Credit where it is due. Those genocidal motherfuckers are scary as hell.
EDIT: I understand the downvotes. Nobody, including myself, wants to say anything positive about the current Israeli regime or their industrial complex of death. Fuck those guys. That said, this op and the discipline it must have taken to keep it under wraps until just the right moment is impressive and VERY scary.