For students interested in how things work, electronic, electrical, mechanical, I recommend watching videos a friend makes
Clive is a friend who is a professional electrician, we met through a theatrical back stage mailing list many years ago. Being an electrician, he understands power systems well but more advanced electronics are more of a hobby for him. I believe his videos are well matched to beginners.
He sometimes does experiments with alcoholic beverages, younger students should skip these videos.
Some things he does are dangerous, please don’t try anything dangerous without proper training and supervision.