Jessica, Patty, and Faithful2Him,
Thank you so much for your replies!!

This makes me feel a better.
Patty,
I am also using the post it notes to put their corrections on. I have them correct it as soon as I can. I LOVE to do it this way, great idea I got from someone on this board (maybe you or Julie?)

!
I was wandering how would you correct the grammar? Here is an example of what I am asking about:
The question in the guide is "How can you tell which animals are mammals?"
My son answers (after I corrected spelling) "You can tell what animal is a mammal because it has fur."
I think he was in a hurry because his answers are usually better than this.... but this sentence is reeeally bothering me!