Linda Fisher, a reporter from New York, has developed a website for students and reporters alike that provides downloadable dictation online. It has dictation ranging in speed from 40 to 230 words per minute. The best part of all is it's free! Just pick your speed, click, and go. It's perfect for reporters practicing for the RPR, RMR, or CRR, and for students practicing for the CSR.
For dictionary building, there's a link to word lists dictated at slow speeds. You can print out the text of the words or write them as they're dictated. The word lists include frequent words, medical suffixes, economic terms, states and their capitols, genetic terms, legal terms, and countries. You just never know when Zimbabwe might come up. If it does, voila!..you're covered.
Check it out here.