PowerPoint is a readily available computer program found installed as part of most Microsoft suites. You should be able to find it on your school's computers. Prezi is a cloud-based presentation tool in which students or teachers must set up an account with a login name and password in order to access the program. There is a free version but students' work can be publicly viewed; otherwise, it costs about five bucks a month to keep it private.
In the PowerPoint program, student create individual slides that appear with the click of a mouse, while the Prezi software utilizes zoom technology to create interesting slide shows that capture the attention of viewers.
Classroom teachers can collaborate with the technologies educator on how best to incorporate PowerPoint or Prezi presentations for assessing students' work. (Suggestion: If students are using Prezi, classroom teachers can set up the account for students to access. This keeps the students from needing to create accounts. In addition, teams can access the presentations, while the teacher can monitor what students are doing.)
With young students, use PowerPoint to create slides that show pictures only, allowing the child the freedom to discuss their topic without worrying about text. For middle school and high school students, however, text and pictures should be combined to demonstrate their understanding of the topic. Gone are the days of boring overhead slides. Students, especially if using Prezi, may also include short movies, music and/or animation to make their presentations interesting.