I agree with all the other comments and have ditched Powerpoint/Keynote in favour of Prezi.
Here is also a helpful link to a presentation on TED by TED about keeping presentations simple: http://www.slideshare.net/mrcoryjim/tedx-presentation-design-tips-e...
In my experience most presentations are way too text heavy and in a way Prezi forces you to get away from the boring dot points...
PS: I'm not a classroom teacher so I can't really make comments about how useful it is in the classroom.
Once you get practice with Prezi a little it gets pretty easy. I think it is great software to use for presentations. I think it is a little more fun than PowerPoint and it can be used the same way as PowerPoint. I am using it right now to make a timeline of the Civil Rights movement for a lesson and I like it because it is fun and you can create the path for it to follow so it can go in any direction you want. I think the students will enjoy watching this Prezi more than if I just put a PowerPoint together and went from one slide to the next.
Prezi should not be viewed as a powerpoint replacement in a school setting in my opinion. It simply does not have the flexibility that Powerpoint does. I think Prezi is wonderful for introducing topics, embedding on websites, and for creating self-contained packets of information for students to explore. It is, however, completely "locked down" and offers zero interaction - unlike PPT.
I honestly feel that Prezi can be used for some things but PPT can be used for anything. In 10 years of PPT use I've yet to come up with an idea that PPT couldn't do. In a couple years of Prezi I've found plenty.
It's the content that matters - not the tools.
It seems to me that some are getting carried away by all the Prezi zooming in and out stuff. People complain about PowerPoint transitions yet think Prezi is OK?
I have seen some terrible Prezis just like there are terrible PowerPoints.
Interestingly, my husband (International IT Manager) was not over-impressed when I showed him a Prezi.
I also think it is good, but it is another of these tools that technically need parental permission for students to have public accounts, and I think a lot of people forget that. Terms of service say:
How much of this applies to the education accounts, I am not sure. So, make sure you look for the teacher/student account signups. EduEnjoy accounts are free, but parental permission is never a bad idea.
Students often use prezi as a means to present inquiry projects as it is a more creative alternative to power point in which students can present their guiding and focusing questions in an interesting manner. The audience is definitely engaged by this presentation type. The students who use Prezi find it relatively easy to navigate.
I have seen and used it before. I think that with some of the different templates, you could do many different subjects. I think that it would be great to use Prezi as a book review, and it would be great to use to introduce a historic person.
I learned about Prezi through a college class last year, and LOVE it! I used it as a tool of identifying the main ideas of chapters I was reading for the course. I also took a "creativity in the classroom" course last semester and we took pictures of things our group did as part of a scavenger hunt. My group then uploaded the pictures onto the Prezi and created a "wordless book." We said that if this was our actually classroom, students would be able to make up their own stories using the pictures found on the Prezi. Those are two of the ways I would use Prezi in my classroom, and I'm sure as classes go along, I will create other ways to incorporate it into my lessons/ classroom!