File > Open
start with the skeleton web page created by Jmol.
Best is to edit this while on Jmol Export to Web
If not, in Kompozer open menu Format > Page title and properties and change the title text
Find "Insert the page TITLE here." and replace with your own page title text.
Same for all other text pieces.
Be careful not to delete or replace anything else (images, table cells, any yellow symbols...)
File > Save
and test it in your web browser.
Now you can copy the whole folder and take it for your class.
Also you can upload it to a web server so that it can be visited by your students.