You'll need to download the fp10_archive.zip file from the Archived Adobe Flash Player versions page. Direct link: http://fpdownload.macromedia.com/get/flashplayer/installers/archive/fp10_archive.zip. This zip file contains numerous releases.
Note that if you have Windows 8 or higher and use IE you cannot install this version. Microsoft embeds Flash Player in IE (and Edge browser) and you cannot uninstall the embedded version (if you force remove it you may not be able to re-install it as Microsoft does not provide a standalone installer for the embedded version of Flash Player).
After downloading do the following:
Before you can install a previous version, you'll need to uninstall the latest version you have using the uninstaller posted at Uninstall Flash Player for Windows (this will not uninstall Flash Player for IE/Edge on Windows 8 and above).
Note that most modern browsers block old versions of Flash Player due to security vulmnerabilities. If your eLearning course is delivered via browser you may not be able to view it due to this.
After you are finished with your eELearning course it's highly recommended to uninstall version old, unsecure version and install the latest version from https://get.adobe.com/flashplayer.