Excellent Text-to-Speech Testing Utility!
As a developer of speech synthesis systems for over 30 years prior to my own vision-loss, I always had a simple utility for testing speech synthesis without opening a word processor to create a new document. For speed-reading, I went up to 460 words per minute with the James voice. I'm glad to hear that the Sharon & James voices are being used in educational institutions where required! Keep up the great work!