From what I know she is a very good teacher, and I don't think her feelings were that off base for teachers who, especially this time of the year, feel pressured by end-of-grade tests and all the expectations associated with preparing her students for next year. But I think many teachers might be missing the chance to do both--engage and excite their students with using technology to communicate with a global audience AND teach the math skills students need to know. In the reply I sent her a voicethread done by Ms. Edwards' class on math skills to show voicethread as a vehicle for student to learn math skills, and I pointed out it doesn't have to be either/or.
So as is the case with so much technology, it's not about voicethread but what voicethread can do for the instruction. Too often technology is seen as a separate piece or class instead of an actual tool to use in all classes. Technology alone will not raise EOG scores or produce better students. But I firmly believe in the hands of an effective teacher, technology can go a long way to engage students in the lessons and even make teaching easier.