Whether in WordPad or with good old pen and paper, writing an acceptable impromptu essay within a time limit takes some practice.
Don't you miss those days?
I remember preparing for the Regent's Exam when I was in college. I rehearsed by writing several essays from a list of sample topics I'd found somewhere. Imagine my surprise when the day of the test arrived, and my actual assignment was one of the ones I had practiced at home. Woo Hoo!
I had a somewhat kooky literature professor who required us to write dozens of in-class essays on books and poems we were required to read. I would sit at home and try to imagine what she would ask of us in class, and I would outline and write my responses. It worked more times than you can believe.
Here's hoping it also works for these two! English Composition CLEP and SAT are coming quickly.