organization, use of visuals, diction, vocal delivery, etc) and what they

organization, use of visuals, diction, vocal delivery, etc) and what they make them especially memorable.
post 4 work of presentations, which every work relate to my friend in the class. what I want you to do is to write about the four presentation to give your comment on (topic, organization, use of visuals, diction, vocal delivery, etc) and what they make them especially memorable.
at the end of the essay you will want to include summary paragraph that brings together your most significant observations about what makes for for an effective oral presentation, and how the unique challenges of presenting technical topics to a non-expert audience can best be met.
the name of people who do the presentation in the class:

1- the best presentation is from (Hisham Alyahya) i will pot for you the URL, and you can see his presentation and write about it. http://prezi.com/-l-ek69knp28/present/?auth_key=dcyj9na&follow=6pqjrln5siok

2- the second one is (Sultan Alselili), and i will post the folder. and his presentation is good.
3- the third one is not bad his name is Abdulrahman al-Saffar, and i will post the folder to day
4-the last one is Ahmed Alvrashwti,

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