I made one for drilling derivatives and anti-derivatives.
Then I got all crazy and thought about colors. We are just starting u-substitution, and part of the issue for kids is to identify the "u" and the "du possibility". I made a sheet where they had to color the u one way and the du another. Here is a sheet with the key on it.
This was meant to be quick classwork. HAH!. What crazy person put 21 problems on the left? Next time less problems. Also, I THINK I like the right hand side, but time ran out, and I haven't asked the kids if either side was useful yet.