I have to admit I am biased. In another life I worked for the multinational Philips for many years. I’ve always been amazed at what they come up with, and thought the Year 9s might enjoy this clip which relates to their current study of light and electricity.
This link connects you to the Doc Brown page on light, this one on electricity. Good interactive quizzes - have a go.
To have a bit of fun with electricity, go to the Electrocity link at the bottom of this website. You can create and manage your own virtual town. The context is New Zealand, so it’s a bit more relevant to us than many sites.