Hello Bettie!
Wendy and Tanya are both correct. The reviewer is requesting that you add "Teacher's aid" to either the front or inside of the card.
Here is a great example. This is written in
http://www.squidoo.com/gcu101 by one of our artists.
"However, suppose you've made a beautiful card and now you need to find a category to put it in. Many artists have difficulty with GCU's policy on categories, so I'll try to explain in the simplest terms: you can ONLY categorize a card by what it IS, not what it COULD BE. In other words, a picture of a rose with the inner verse "I love you" is not suitable for the Valentine's Day category. Why? Because nowhere on the card does it say "Happy Valentine's Day." Remember what I said? What the card IS, not what it COULD BE."
Hope this helps!