I don't know if anything's changed, maybe schools are laxer than mine was, but they made me wipe my memory before taking standardized tests.

It was trivial to write a program that mimicked the wipe-memory screen with assembly (without assembly you could try to get away from it, but there were subtle differences in the menu UI with a TI basic menu and the system menus)

Again, maybe my school was different, but you gave it to the teacher and they'd wipe it and give it back.

They are talking about installing software that fakes it. First result from a quick search:

https://brandonw.net/calculators/fake/