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In high school, I saw my teachers using differentiation. I had a geometry teacher, who would lecture, have models, and show us a video of the lesson. It seemed to be an effective method that targeted the three major learning styles. From what I saw in high school, most teachers tried to approach material in a variety of presenting the material to appeal to these different learners; but once I stepped into the college classroom I see that most professors don't take that approach and teach it the way that is most comfortable for them.
I think technology can really help a teacher differentiate their classroom. On the internet a teacher or even a student can find countless videos, websites, games, or blogs that can discuss a lesson that a teacher can show their students. This will give students a group of different activities that explain a lesson.