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Alternatives to the Moodle slideshow are third party tools like;
Photo hosting sites like Flickr http://en.wikipedia.org/wiki/List_of_photo-sharing_websites
Google Docs
One of the many free online slideshow maker tools - try searching the web for keywords slideshow maker eg https://www.google.com/search?q=slidesow+maker#q=slideshow+maker
Scorm course format no longer available
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