I have been using Canva for a couple years and while I was subbing, I was reminded of how awesome this website is! Even students love it. With a free subscription, you can create presentations, videos, images and more! There are templates available for educators. When you're done, you can download or share your creation. A membership is currently running just under $15/month. It would be a worthwhile investment if the free subscription was not enough, but there is already so much available!
I'm just a science teacher sitting at my computer generating and finding ideas to make learning more enjoyable.