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https://support.office.com/en-us/article/basic-tasks-for-creating-a-powerpoint-presentation-efbbc1cd-c5f1-4264-b48e-c8a7b0334e36
https://www.webjunction.org/content/dam/WebJunction/Documents/webJunction/Practical_PPT_Image_Tips.pdf
http://www.lausd.k12.ca.us/Wright_Magnet/teachers/lrubin/ppt1