Unlock a teacher text box

Is there a way to create a text box as a teacher that students CAN delete in the student version? I want to use Kami to give a spelling pretest. My thought is to hide the list with a white text box and have the students delete the text box after the pretest. This way they can see the words written correctly in order to check their words.

You cannot. When you save and upload, Kami would treat it as original file. So, the edit path, aka undo and redo, will be deleted. Only way to cover the text box is to cover the text box.