Once you have collected your documents and written your HTML exercises, you will want to create a tutorial file which you students can load into their copy of Geneious Prime. This is a standard 'ZIP' file and can be created using the command-line zip program on Linux or Mac OS X, or the 'Explorer'/'Finder' compress functions on Windows and Mac OS X.
The UNIX (Linux, Mac OS X & Solaris are all based on UNIX) command-line zip is simple. Go into the directory where all your documents are stored and use the following command:
zip Tutorial.tutorial.zip *
Note: The first part (Tutorial) can be anything you like but should be meaningful. If you want to include spaces in the name you will need to include "\". For example zip Tutorial name.tutorial.zip * won't work, but zip Tutorial\ name.tutorial.zip * will.
This will create a file called Tutorial.tutorial.zip which can be dragged into Geneious Prime. It will automatically be recognised as being a tutorial because it is called .tutorial.zip.
On Windows, you can achieve the same thing by selecting all the documents in 'Explorer' and then right click and select Send to -> Compressed (zipped) folder. Remember to rename the resulting file Tutorial.tutorial. Windows may hide the .zip extension.
On Mac OS X, the Finder can compress in a similar way. Select all the files in the folder and then CTRL click and select compress items. The resulting file will be called Archive.zip but you should rename it to Tutorial.tutorial.zip.
Note: you can call your tutorial anything as long as it ends tutorial.zip. If you leave out .tutorial Geneious will unzip and import the contents rather than formatting it as a tutorial.
You should now be able to write a Geneious Prime tutorial for your students. Feel free to look at the source of this tutorial by unzipping the file you downloaded (Creating_Tutorials.tutorial.zip) so you can see the various HTML, image and Geneious documents. Good luck!