This update (3.13) resolves a small bug in the PrimerPrep program: If you added one or more sight words as the first lesson in the teaching order (i.e. before teaching any individual letters), and tried to add some Lesson Text to check for that lesson, PrimerPrep would go off by itself to have a long think and never come back! You would have to force the program to close, and you would lose any unsaved analyses. This new version now properly handles a lesson text for a sight word lesson that is at the top of the teaching order.