Just started Introduction to Linux with the Linux Foundation and edX. It is great to undertake these courses and have them accessible to all. Well worth a look. I started the HTML course with freeCodeCamp a while back.
These education providers are truly 21st century and inclusive regardless of how old you are and previous education level. You can also study at any time and the help from forums is really good too. Welcome to the 21st century, education for ALL. education linux html edx Hopefully this will help if working as a Teaching Assistant or perhaps Learning facilitator.
Also posted this to linkedIn.