The PDFs you make in this way are fully scalable, and suitable for making posters, T-Shirts, what have you. Then collect all their reflections into a Wordle.
I've been having lots of fun with Wordle — a free website that creates " word clouds " or "tag clouds" for text analysis. You must first display your Wordle at the desired size, then take a "screen shot" or "screen capture".
The programs that do that kind of thing typically choose their space-filling text from a small repertoire of words or phrases. Or you can do a screen capture of the Wordle.
It's the part that deals with breaking text into words, and recognizing common words. Due to my agreement with my former employer, I am not free to license Wordle, nor to engage in any sort of busness deal around Wordle technology.
You should do stemming! I used to be able to. That code belongs to IBM, so it isn't mine to share.
By running the text of a paper through the cloud generator a student can easily see if the main points displayed in the cloud match the main points they hoped to cover or convey in their writing. Click the screen shots below to enlarge.