In my art 1 class, we are working on creating block prints.  I talk about it being the reverse image from the block to the print. I asked the students not to do letters because I really wanted them to concentrate on learning the process, not dealing with making sure that the letters are the mirror image.  I thought I had it all covered.

I was wrong.  Neither the student nor myself caught it until another student saw the proof print and mentioned it.

Can you tell what is wrong here?