calling for suggestions please

I suggest you look, instead to Moodle. It is free and used widely. It's 
made for your application. https://moodle.org Bill William Prothero 
http://es.earthednet.org

Absolutely.
My daughter teaches IT, media and other subjects, uses Moodle and has 
set ups sites with Moodle, she strongly recommends it as an education 
tool. It is free. May I recommend that no one goes to sites that charge 
for Moodle or Drupal.
https://download.moodle.org/

Moodle is far and away better than the commercial offerings and far 
surpasses some of the systems that schools pay thousands of dollars for.

Roger
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