my mom was a teacher, and i clearly remember the required use of powerpoint to be a major detriment to her teaching. as another example, i was horrified recently during a volunteer opportunity at a local high school at the use of chromebooks in the classroom. it seemed like such a blind use that served no purpose other than to further seaparate the students and teachers from social interaction and communication.
i think something like dynamicland is the only technology that has promise to be used as an educational tool.